diff --git a/src/backend/utils/init/postinit.c b/src/backend/utils/init/postinit.c
index a024b1151d0..150ec3f52f8 100644
--- a/src/backend/utils/init/postinit.c
+++ b/src/backend/utils/init/postinit.c
@@ -360,7 +360,7 @@ CheckMyDatabase(const char *name, bool am_superuser, bool override_allow_connect
 		 * and save a few cycles.)
 		 */
 		if (!am_superuser &&
-			object_aclcheck(DatabaseRelationId, MyDatabaseId, GetUserId(),
+			object_aclcheck(DatabaseRelationId, MyDatabaseId, GetSessionUserId(),
 							ACL_CONNECT) != ACLCHECK_OK)
 			ereport(FATAL,
 					(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),