diff --git a/django/contrib/admin/validation.py b/django/contrib/admin/validation.py
index 94d4bbd9ce..f743f2c6c7 100644
--- a/django/contrib/admin/validation.py
+++ b/django/contrib/admin/validation.py
@@ -245,6 +245,12 @@ def validate_base(cls, model):
                 if type(fields) != tuple:
                     fields = (fields,)
                 for field in fields:
+                    if field in cls.readonly_fields:
+                        # Stuff can be put in fields that isn't actually a
+                        # model field if it's in readonly_fields,
+                        # readonly_fields will handle the validation of such
+                        # things.
+                        continue
                     check_formfield(cls, model, opts, "fieldsets[%d][1]['fields']" % idx, field)
                     try:
                         f = opts.get_field(field)
diff --git a/tests/regressiontests/admin_validation/models.py b/tests/regressiontests/admin_validation/models.py
index ef65c45352..b50764844e 100644
--- a/tests/regressiontests/admin_validation/models.py
+++ b/tests/regressiontests/admin_validation/models.py
@@ -12,6 +12,7 @@ class Album(models.Model):
 class Song(models.Model):
     title = models.CharField(max_length=150)
     album = models.ForeignKey(Album)
+    original_release = models.DateField(editable=False)
 
     class Meta:
         ordering = ('title',)
diff --git a/tests/regressiontests/admin_validation/tests.py b/tests/regressiontests/admin_validation/tests.py
new file mode 100644
index 0000000000..9166360ae3
--- /dev/null
+++ b/tests/regressiontests/admin_validation/tests.py
@@ -0,0 +1,18 @@
+from django.contrib import admin
+from django.contrib.admin.validation import validate
+from django.test import TestCase
+
+from models import Song
+
+
+class ValidationTestCase(TestCase):
+    def test_readonly_and_editable(self):
+        class SongAdmin(admin.ModelAdmin):
+            readonly_fields = ["original_release"]
+            fieldsets = [
+                (None, {
+                    "fields": ["title", "original_release"],
+                }),
+            ]
+        
+        validate(SongAdmin, Song)