diff --git a/django/forms/models.py b/django/forms/models.py
index 0760f9d540..b23d815775 100644
--- a/django/forms/models.py
+++ b/django/forms/models.py
@@ -949,7 +949,7 @@ def _get_foreign_key(parent_model, model, fk_name=None, can_fail=False):
                     (fk.rel.to != parent_model and
                      fk.rel.to not in parent_model._meta.get_parent_list()):
                 raise ValueError(
-                    "fk_name '%s' is not a ForeignKey to '%s.%'."
+                    "fk_name '%s' is not a ForeignKey to '%s.%s'."
                     % (fk_name, parent_model._meta.app_label, parent_model._meta.object_name))
         elif len(fks_to_parent) == 0:
             raise ValueError(
diff --git a/docs/releases/1.7.1.txt b/docs/releases/1.7.1.txt
index 85421f2fa4..368749f595 100644
--- a/docs/releases/1.7.1.txt
+++ b/docs/releases/1.7.1.txt
@@ -23,3 +23,6 @@ Bugfixes
 
 * The ``@deconstructible`` decorator now fails with a ``ValueError`` if the
   decorated object cannot automatically be imported (:ticket:`23418`).
+
+* Fixed a typo in an ``inlineformset_factory()`` error message that caused a
+  crash (:ticket:`23451`).
diff --git a/tests/model_formsets/tests.py b/tests/model_formsets/tests.py
index 19c0a6d9d5..58d8bcc9ab 100644
--- a/tests/model_formsets/tests.py
+++ b/tests/model_formsets/tests.py
@@ -815,6 +815,12 @@ class ModelFormsetTest(TestCase):
         formset = AuthorBooksFormSet(data, instance=author, queryset=custom_qs)
         self.assertTrue(formset.is_valid())
 
+    def test_inline_formsets_with_wrong_fk_name(self):
+        """ Regression for #23451 """
+        message = "fk_name 'title' is not a ForeignKey to 'model_formsets.Author'."
+        with self.assertRaisesMessage(ValueError, message):
+            inlineformset_factory(Author, Book, fields="__all__", fk_name='title')
+
     def test_custom_pk(self):
         # We need to ensure that it is displayed