diff --git a/django/contrib/admin/static/admin/js/inlines.js b/django/contrib/admin/static/admin/js/inlines.js
index a284d76c3c2..4e9bb77e9c4 100644
--- a/django/contrib/admin/static/admin/js/inlines.js
+++ b/django/contrib/admin/static/admin/js/inlines.js
@@ -44,17 +44,19 @@
             $(this).not("." + options.emptyCssClass).addClass(options.formCssClass);
         });
         if ($this.length && showAddButton) {
-            var addButton;
-            if ($this.prop("tagName") === "TR") {
-                // If forms are laid out as table rows, insert the
-                // "add" button in a new table row:
-                var numCols = this.eq(-1).children().length;
-                $parent.append('<tr class="' + options.addCssClass + '"><td colspan="' + numCols + '"><a href="#">' + options.addText + "</a></tr>");
-                addButton = $parent.find("tr:last a");
-            } else {
-                // Otherwise, insert it immediately after the last form:
-                $this.filter(":last").after('<div class="' + options.addCssClass + '"><a href="#">' + options.addText + "</a></div>");
-                addButton = $this.filter(":last").next().find("a");
+            var addButton = options.addButton;
+            if (addButton === null) {
+                if ($this.prop("tagName") === "TR") {
+                    // If forms are laid out as table rows, insert the
+                    // "add" button in a new table row:
+                    var numCols = this.eq(-1).children().length;
+                    $parent.append('<tr class="' + options.addCssClass + '"><td colspan="' + numCols + '"><a href="#">' + options.addText + "</a></tr>");
+                    addButton = $parent.find("tr:last a");
+                } else {
+                    // Otherwise, insert it immediately after the last form:
+                    $this.filter(":last").after('<div class="' + options.addCssClass + '"><a href="#">' + options.addText + "</a></div>");
+                    addButton = $this.filter(":last").next().find("a");
+                }
             }
             addButton.click(function(e) {
                 e.preventDefault();
@@ -137,7 +139,8 @@
         emptyCssClass: "empty-row",    // CSS class applied to the empty row
         formCssClass: "dynamic-form",  // CSS class applied to each form in a formset
         added: null,          // Function called each time a new form is added
-        removed: null          // Function called each time a form is deleted
+        removed: null,          // Function called each time a form is deleted
+        addButton: null       // Existing add button to use
     };
 
 
@@ -201,7 +204,8 @@
                 reinitDateTimeShortCuts();
                 updateSelectFilter();
                 alternatingRows(row);
-            }
+            },
+            addButton: options.addButton
         });
 
         return $rows;
@@ -267,7 +271,8 @@
                 reinitDateTimeShortCuts();
                 updateSelectFilter();
                 updateInlineLabel(row);
-            }
+            },
+            addButton: options.addButton
         });
 
         return $rows;
diff --git a/django/contrib/admin/static/admin/js/inlines.min.js b/django/contrib/admin/static/admin/js/inlines.min.js
index 7e5228d7adf..1968ac2ae4b 100644
--- a/django/contrib/admin/static/admin/js/inlines.min.js
+++ b/django/contrib/admin/static/admin/js/inlines.min.js
@@ -1,10 +1,10 @@
 (function(c){c.fn.formset=function(b){var a=c.extend({},c.fn.formset.defaults,b),d=c(this);b=d.parent();var k=function(a,g,l){var b=new RegExp("("+g+"-(\\d+|__prefix__))");g=g+"-"+l;c(a).prop("for")&&c(a).prop("for",c(a).prop("for").replace(b,g));a.id&&(a.id=a.id.replace(b,g));a.name&&(a.name=a.name.replace(b,g))},e=c("#id_"+a.prefix+"-TOTAL_FORMS").prop("autocomplete","off"),l=parseInt(e.val(),10),g=c("#id_"+a.prefix+"-MAX_NUM_FORMS").prop("autocomplete","off"),h=""===g.val()||0<g.val()-e.val();
-d.each(function(g){c(this).not("."+a.emptyCssClass).addClass(a.formCssClass)});if(d.length&&h){var m;"TR"===d.prop("tagName")?(d=this.eq(-1).children().length,b.append('<tr class="'+a.addCssClass+'"><td colspan="'+d+'"><a href="#">'+a.addText+"</a></tr>"),m=b.find("tr:last a")):(d.filter(":last").after('<div class="'+a.addCssClass+'"><a href="#">'+a.addText+"</a></div>"),m=d.filter(":last").next().find("a"));m.click(function(b){b.preventDefault();b=c("#"+a.prefix+"-empty");var f=b.clone(!0);f.removeClass(a.emptyCssClass).addClass(a.formCssClass).attr("id",
-a.prefix+"-"+l);f.is("tr")?f.children(":last").append('<div><a class="'+a.deleteCssClass+'" href="#">'+a.deleteText+"</a></div>"):f.is("ul")||f.is("ol")?f.append('<li><a class="'+a.deleteCssClass+'" href="#">'+a.deleteText+"</a></li>"):f.children(":first").append('<span><a class="'+a.deleteCssClass+'" href="#">'+a.deleteText+"</a></span>");f.find("*").each(function(){k(this,a.prefix,e.val())});f.insertBefore(c(b));c(e).val(parseInt(e.val(),10)+1);l+=1;""!==g.val()&&0>=g.val()-e.val()&&m.parent().hide();
-f.find("a."+a.deleteCssClass).click(function(b){b.preventDefault();f.remove();--l;a.removed&&a.removed(f);c(document).trigger("formset:removed",[f,a.prefix]);b=c("."+a.formCssClass);c("#id_"+a.prefix+"-TOTAL_FORMS").val(b.length);(""===g.val()||0<g.val()-b.length)&&m.parent().show();var h,d,e=function(){k(this,a.prefix,h)};h=0;for(d=b.length;h<d;h++)k(c(b).get(h),a.prefix,h),c(b.get(h)).find("*").each(e)});a.added&&a.added(f);c(document).trigger("formset:added",[f,a.prefix])})}return this};c.fn.formset.defaults=
-{prefix:"form",addText:"add another",deleteText:"remove",addCssClass:"add-row",deleteCssClass:"delete-row",emptyCssClass:"empty-row",formCssClass:"dynamic-form",added:null,removed:null};c.fn.tabularFormset=function(b){var a=c(this),d=function(b){c(a.selector).not(".add-row").removeClass("row1 row2").filter(":even").addClass("row1").end().filter(":odd").addClass("row2")},k=function(){"undefined"!==typeof SelectFilter&&(c(".selectfilter").each(function(a,c){var b=c.name.split("-");SelectFilter.init(c.id,
-b[b.length-1],!1)}),c(".selectfilterstacked").each(function(a,c){var b=c.name.split("-");SelectFilter.init(c.id,b[b.length-1],!0)}))},e=function(a){a.find(".prepopulated_field").each(function(){var b=c(this).find("input, select, textarea"),h=b.data("dependency_list")||[],d=[];c.each(h,function(c,b){d.push("#"+a.find(".field-"+b).find("input, select, textarea").attr("id"))});d.length&&b.prepopulate(d,b.attr("maxlength"))})};a.formset({prefix:b.prefix,addText:b.addText,formCssClass:"dynamic-"+b.prefix,
-deleteCssClass:"inline-deletelink",deleteText:b.deleteText,emptyCssClass:"empty-form",removed:d,added:function(a){e(a);"undefined"!==typeof DateTimeShortcuts&&(c(".datetimeshortcuts").remove(),DateTimeShortcuts.init());k();d(a)}});return a};c.fn.stackedFormset=function(b){var a=c(this),d=function(b){c(a.selector).find(".inline_label").each(function(a){a+=1;c(this).html(c(this).html().replace(/(#\d+)/g,"#"+a))})},k=function(){"undefined"!==typeof SelectFilter&&(c(".selectfilter").each(function(a,c){var b=
-c.name.split("-");SelectFilter.init(c.id,b[b.length-1],!1)}),c(".selectfilterstacked").each(function(a,c){var b=c.name.split("-");SelectFilter.init(c.id,b[b.length-1],!0)}))},e=function(a){a.find(".prepopulated_field").each(function(){var b=c(this).find("input, select, textarea"),d=b.data("dependency_list")||[],e=[];c.each(d,function(b,c){e.push("#"+a.find(".form-row .field-"+c).find("input, select, textarea").attr("id"))});e.length&&b.prepopulate(e,b.attr("maxlength"))})};a.formset({prefix:b.prefix,
-addText:b.addText,formCssClass:"dynamic-"+b.prefix,deleteCssClass:"inline-deletelink",deleteText:b.deleteText,emptyCssClass:"empty-form",removed:d,added:function(a){e(a);"undefined"!==typeof DateTimeShortcuts&&(c(".datetimeshortcuts").remove(),DateTimeShortcuts.init());k();d(a)}});return a};c(document).ready(function(){c(".js-inline-admin-formset").each(function(){var b=c(this).data(),a=b.inlineFormset;switch(b.inlineType){case "stacked":c(a.name+"-group .inline-related").stackedFormset(a.options);
-break;case "tabular":c(a.name+"-group .tabular.inline-related tbody tr").tabularFormset(a.options)}})})})(django.jQuery);
+d.each(function(g){c(this).not("."+a.emptyCssClass).addClass(a.formCssClass)});if(d.length&&h){var m=a.addButton;null===m&&("TR"===d.prop("tagName")?(d=this.eq(-1).children().length,b.append('<tr class="'+a.addCssClass+'"><td colspan="'+d+'"><a href="#">'+a.addText+"</a></tr>"),m=b.find("tr:last a")):(d.filter(":last").after('<div class="'+a.addCssClass+'"><a href="#">'+a.addText+"</a></div>"),m=d.filter(":last").next().find("a")));m.click(function(b){b.preventDefault();b=c("#"+a.prefix+"-empty");
+var f=b.clone(!0);f.removeClass(a.emptyCssClass).addClass(a.formCssClass).attr("id",a.prefix+"-"+l);f.is("tr")?f.children(":last").append('<div><a class="'+a.deleteCssClass+'" href="#">'+a.deleteText+"</a></div>"):f.is("ul")||f.is("ol")?f.append('<li><a class="'+a.deleteCssClass+'" href="#">'+a.deleteText+"</a></li>"):f.children(":first").append('<span><a class="'+a.deleteCssClass+'" href="#">'+a.deleteText+"</a></span>");f.find("*").each(function(){k(this,a.prefix,e.val())});f.insertBefore(c(b));
+c(e).val(parseInt(e.val(),10)+1);l+=1;""!==g.val()&&0>=g.val()-e.val()&&m.parent().hide();f.find("a."+a.deleteCssClass).click(function(b){b.preventDefault();f.remove();--l;a.removed&&a.removed(f);c(document).trigger("formset:removed",[f,a.prefix]);b=c("."+a.formCssClass);c("#id_"+a.prefix+"-TOTAL_FORMS").val(b.length);(""===g.val()||0<g.val()-b.length)&&m.parent().show();var h,d,e=function(){k(this,a.prefix,h)};h=0;for(d=b.length;h<d;h++)k(c(b).get(h),a.prefix,h),c(b.get(h)).find("*").each(e)});a.added&&
+a.added(f);c(document).trigger("formset:added",[f,a.prefix])})}return this};c.fn.formset.defaults={prefix:"form",addText:"add another",deleteText:"remove",addCssClass:"add-row",deleteCssClass:"delete-row",emptyCssClass:"empty-row",formCssClass:"dynamic-form",added:null,removed:null,addButton:null};c.fn.tabularFormset=function(b){var a=c(this),d=function(b){c(a.selector).not(".add-row").removeClass("row1 row2").filter(":even").addClass("row1").end().filter(":odd").addClass("row2")},k=function(){"undefined"!==
+typeof SelectFilter&&(c(".selectfilter").each(function(a,c){var b=c.name.split("-");SelectFilter.init(c.id,b[b.length-1],!1)}),c(".selectfilterstacked").each(function(a,c){var b=c.name.split("-");SelectFilter.init(c.id,b[b.length-1],!0)}))},e=function(a){a.find(".prepopulated_field").each(function(){var b=c(this).find("input, select, textarea"),h=b.data("dependency_list")||[],d=[];c.each(h,function(c,b){d.push("#"+a.find(".field-"+b).find("input, select, textarea").attr("id"))});d.length&&b.prepopulate(d,
+b.attr("maxlength"))})};a.formset({prefix:b.prefix,addText:b.addText,formCssClass:"dynamic-"+b.prefix,deleteCssClass:"inline-deletelink",deleteText:b.deleteText,emptyCssClass:"empty-form",removed:d,added:function(a){e(a);"undefined"!==typeof DateTimeShortcuts&&(c(".datetimeshortcuts").remove(),DateTimeShortcuts.init());k();d(a)},addButton:b.addButton});return a};c.fn.stackedFormset=function(b){var a=c(this),d=function(b){c(a.selector).find(".inline_label").each(function(a){a+=1;c(this).html(c(this).html().replace(/(#\d+)/g,
+"#"+a))})},k=function(){"undefined"!==typeof SelectFilter&&(c(".selectfilter").each(function(a,c){var b=c.name.split("-");SelectFilter.init(c.id,b[b.length-1],!1)}),c(".selectfilterstacked").each(function(a,c){var b=c.name.split("-");SelectFilter.init(c.id,b[b.length-1],!0)}))},e=function(a){a.find(".prepopulated_field").each(function(){var b=c(this).find("input, select, textarea"),d=b.data("dependency_list")||[],e=[];c.each(d,function(b,c){e.push("#"+a.find(".form-row .field-"+c).find("input, select, textarea").attr("id"))});
+e.length&&b.prepopulate(e,b.attr("maxlength"))})};a.formset({prefix:b.prefix,addText:b.addText,formCssClass:"dynamic-"+b.prefix,deleteCssClass:"inline-deletelink",deleteText:b.deleteText,emptyCssClass:"empty-form",removed:d,added:function(a){e(a);"undefined"!==typeof DateTimeShortcuts&&(c(".datetimeshortcuts").remove(),DateTimeShortcuts.init());k();d(a)},addButton:b.addButton});return a};c(document).ready(function(){c(".js-inline-admin-formset").each(function(){var b=c(this).data(),a=b.inlineFormset;
+switch(b.inlineType){case "stacked":c(a.name+"-group .inline-related").stackedFormset(a.options);break;case "tabular":c(a.name+"-group .tabular.inline-related tbody tr").tabularFormset(a.options)}})})})(django.jQuery);
diff --git a/js_tests/admin/inlines.test.js b/js_tests/admin/inlines.test.js
index d4c642ec40d..b18b266024a 100644
--- a/js_tests/admin/inlines.test.js
+++ b/js_tests/admin/inlines.test.js
@@ -51,3 +51,21 @@ test('add/remove form events', function(assert) {
     });
     deleteLink.click();
 });
+
+test('existing add button', function(assert) {
+    var $ = django.jQuery;
+    $('#qunit-fixture').empty();  // Clear the table added in beforeEach
+    $('#qunit-fixture').append($('#tabular-formset').text());
+    this.table = $('table.inline');
+    this.inlineRow = this.table.find('tr');
+    this.table.append('<i class="add-button"></i>');
+    var addButton = this.table.find('.add-button');
+    this.inlineRow.tabularFormset({
+        prefix: 'first',
+        deleteText: 'Remove',
+        addButton: addButton
+    });
+    assert.equal(this.table.find('.add-row a').length, 0);
+    addButton.click();
+    assert.ok(this.table.find('#first-1').hasClass('row2'));
+});