diff --git a/src/backend/distributed/commands/grant.c b/src/backend/distributed/commands/grant.c
index 43645fa3b..f49fac4a5 100644
--- a/src/backend/distributed/commands/grant.c
+++ b/src/backend/distributed/commands/grant.c
@@ -42,6 +42,7 @@ PreprocessGrantStmt(Node *node, const char *queryString)
 			case OBJECT_SCHEMA:
 			case OBJECT_DATABASE:
 #else
+			case ACL_OBJECT_NAMESPACE:
 			case ACL_OBJECT_DATABASE:
 #endif
 				{