diff --git a/django_filters/filterset.py b/django_filters/filterset.py
index a594a1229..53d48b28e 100644
--- a/django_filters/filterset.py
+++ b/django_filters/filterset.py
@@ -22,6 +22,7 @@
     DateTimeFilter,
     DurationFilter,
     Filter,
+    LookupChoiceFilter,
     ModelChoiceFilter,
     ModelMultipleChoiceFilter,
     NumberFilter,
@@ -344,8 +345,11 @@ def get_filters(cls):
                 if field is not None:
                     filters[filter_name] = cls.filter_for_field(field, field_name, lookup_expr)
 
-        # filter out declared filters
-        undefined = [f for f in undefined if f not in cls.declared_filters]
+        # filter out declared filters where expressions are same as those in declared fields
+        undefined = [f for f in undefined
+                     if f not in cls.declared_filters or
+                     (not isinstance(cls.declared_filters[f], LookupChoiceFilter) and
+                     fields[f] != [cls.declared_filters[f].lookup_expr])] # noqa
         if undefined:
             raise TypeError(
                 "'Meta.fields' contains fields that are not defined on this FilterSet: "
diff --git a/tests/test_filtering.py b/tests/test_filtering.py
index 538a682ed..1bdd0f52d 100644
--- a/tests/test_filtering.py
+++ b/tests/test_filtering.py
@@ -1961,3 +1961,21 @@ class Meta:
         f = F({'status': '2'}, queryset=qs)
         self.assertEqual(len(f.qs), 2)
         self.assertEqual(f.qs.count(), 2)
+
+    def test_declared_field_additional_lookup_invalid(self):
+        msg = "'Meta.fields' contains fields that are not defined on this FilterSet: account"
+        with self.assertRaises(TypeError) as excinfo:
+            class F(FilterSet):
+                account = CharFilter(field_name='username')
+
+                class Meta:
+                    model = User
+                    fields = {
+                        'account': ['exact', 'contains'],
+                    }
+            F()
+
+        self.assertEqual(
+            str(excinfo.exception),
+            msg
+        )