diff --git a/django/db/backends/__init__.py b/django/db/backends/__init__.py
index 54f5535853..2843e0d4c3 100644
--- a/django/db/backends/__init__.py
+++ b/django/db/backends/__init__.py
@@ -185,7 +185,7 @@ class BaseDatabaseFeatures(object):
 
         try:
             self.connection.ops.check_aggregate_support(StdDevPop())
-        except DatabaseError:
+        except NotImplementedError:
             self.supports_stddev = False