diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index 18ec5f03d8..20384db2fb 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -6747,7 +6747,6 @@ opt_collate: COLLATE any_name						{ $$ = $2; }
 		;
 
 opt_class:	any_name								{ $$ = $1; }
-			| USING any_name						{ $$ = $2; }
 			| /*EMPTY*/								{ $$ = NIL; }
 		;