diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index 679e1bb5ae4..36dac299144 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -3907,13 +3907,13 @@ AlterExtensionContentsStmt:
 					n->objname = $6;
 					$$ = (Node *)n;
 				}
-			| ALTER EXTENSION name add_drop DOMAIN_P any_name
+			| ALTER EXTENSION name add_drop DOMAIN_P Typename
 				{
 					AlterExtensionContentsStmt *n = makeNode(AlterExtensionContentsStmt);
 					n->extname = $3;
 					n->action = $4;
 					n->objtype = OBJECT_DOMAIN;
-					n->objname = $6;
+					n->objname = list_make1($6);
 					$$ = (Node *)n;
 				}
 			| ALTER EXTENSION name add_drop FUNCTION function_with_argtypes
@@ -4082,13 +4082,13 @@ AlterExtensionContentsStmt:
 					n->objname = list_make1(makeString($6));
 					$$ = (Node *)n;
 				}
-			| ALTER EXTENSION name add_drop TYPE_P any_name
+			| ALTER EXTENSION name add_drop TYPE_P Typename
 				{
 					AlterExtensionContentsStmt *n = makeNode(AlterExtensionContentsStmt);
 					n->extname = $3;
 					n->action = $4;
 					n->objtype = OBJECT_TYPE;
-					n->objname = $6;
+					n->objname = list_make1($6);
 					$$ = (Node *)n;
 				}
 		;