diff --git a/django/contrib/admin/static/admin/js/inlines.js b/django/contrib/admin/static/admin/js/inlines.js
index 668e1157c8..c11af82f76 100644
--- a/django/contrib/admin/static/admin/js/inlines.js
+++ b/django/contrib/admin/static/admin/js/inlines.js
@@ -44,7 +44,7 @@
 			if ($(this).attr("tagName") == "TR") {
 				// If forms are laid out as table rows, insert the
 				// "add" button in a new table row:
-				var numCols = this.eq(0).children().length;
+				var numCols = this.eq(-1).children().length;
 				$(this).parent().append('<tr class="' + options.addCssClass + '"><td colspan="' + numCols + '"><a href="javascript:void(0)">' + options.addText + "</a></tr>");
 				addButton = $(this).parent().find("tr:last a");
 			} else {
diff --git a/django/contrib/admin/static/admin/js/inlines.min.js b/django/contrib/admin/static/admin/js/inlines.min.js
index 53dd92f2f9..e4a675407e 100644
--- a/django/contrib/admin/static/admin/js/inlines.min.js
+++ b/django/contrib/admin/static/admin/js/inlines.min.js
@@ -1,5 +1,5 @@
 (function(b){b.fn.formset=function(c){var a=b.extend({},b.fn.formset.defaults,c),j=function(a,f,d){var e=RegExp("("+f+"-(\\d+|__prefix__))"),f=f+"-"+d;b(a).attr("for")&&b(a).attr("for",b(a).attr("for").replace(e,f));a.id&&(a.id=a.id.replace(e,f));a.name&&(a.name=a.name.replace(e,f))},c=b("#id_"+a.prefix+"-TOTAL_FORMS").attr("autocomplete","off"),h=parseInt(c.val(),10),g=b("#id_"+a.prefix+"-MAX_NUM_FORMS").attr("autocomplete","off"),c=""===g.val()||0<g.val()-c.val();b(this).each(function(){b(this).not("."+
-a.emptyCssClass).addClass(a.formCssClass)});if(b(this).length&&c){var i;"TR"==b(this).attr("tagName")?(c=this.eq(0).children().length,b(this).parent().append('<tr class="'+a.addCssClass+'"><td colspan="'+c+'"><a href="javascript:void(0)">'+a.addText+"</a></tr>"),i=b(this).parent().find("tr:last a")):(b(this).filter(":last").after('<div class="'+a.addCssClass+'"><a href="javascript:void(0)">'+a.addText+"</a></div>"),i=b(this).filter(":last").next().find("a"));i.click(function(c){c.preventDefault();
+a.emptyCssClass).addClass(a.formCssClass)});if(b(this).length&&c){var i;"TR"==b(this).attr("tagName")?(c=this.eq(-1).children().length,b(this).parent().append('<tr class="'+a.addCssClass+'"><td colspan="'+c+'"><a href="javascript:void(0)">'+a.addText+"</a></tr>"),i=b(this).parent().find("tr:last a")):(b(this).filter(":last").after('<div class="'+a.addCssClass+'"><a href="javascript:void(0)">'+a.addText+"</a></div>"),i=b(this).filter(":last").next().find("a"));i.click(function(c){c.preventDefault();
 var f=b("#id_"+a.prefix+"-TOTAL_FORMS"),c=b("#"+a.prefix+"-empty"),d=c.clone(true);d.removeClass(a.emptyCssClass).addClass(a.formCssClass).attr("id",a.prefix+"-"+h);d.is("tr")?d.children(":last").append('<div><a class="'+a.deleteCssClass+'" href="javascript:void(0)">'+a.deleteText+"</a></div>"):d.is("ul")||d.is("ol")?d.append('<li><a class="'+a.deleteCssClass+'" href="javascript:void(0)">'+a.deleteText+"</a></li>"):d.children(":first").append('<span><a class="'+a.deleteCssClass+'" href="javascript:void(0)">'+
 a.deleteText+"</a></span>");d.find("*").each(function(){j(this,a.prefix,f.val())});d.insertBefore(b(c));b(f).val(parseInt(f.val(),10)+1);h=h+1;g.val()!==""&&g.val()-f.val()<=0&&i.parent().hide();d.find("a."+a.deleteCssClass).click(function(e){e.preventDefault();e=b(this).parents("."+a.formCssClass);e.remove();h=h-1;a.removed&&a.removed(e);e=b("."+a.formCssClass);b("#id_"+a.prefix+"-TOTAL_FORMS").val(e.length);(g.val()===""||g.val()-e.length>0)&&i.parent().show();for(var c=0,d=e.length;c<d;c++){j(b(e).get(c),
 a.prefix,c);b(e.get(c)).find("*").each(function(){j(this,a.prefix,c)})}});a.added&&a.added(d)})}return this};b.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}})(django.jQuery);