diff --git a/third_party/libpg_query/grammar/statements/pgq.y b/third_party/libpg_query/grammar/statements/pgq.y
index 18424b86d6d1..ca2fa2e69c6d 100644
--- a/third_party/libpg_query/grammar/statements/pgq.y
+++ b/third_party/libpg_query/grammar/statements/pgq.y
@@ -570,7 +570,7 @@ CostNum:
 CostDefault:
 		DEFAULT CostNum				{ $$ = $2; }
 	|
-		/* EMPTY */ 				{ $$ = NULL; }
+		/* EMPTY */ 				{ $$ = (int)NULL; }
 		;
 
 CostOptional:
diff --git a/third_party/libpg_query/src_backend_parser_gram.cpp b/third_party/libpg_query/src_backend_parser_gram.cpp
index 22bb22fa0fa7..f30f8eeed0a2 100644
--- a/third_party/libpg_query/src_backend_parser_gram.cpp
+++ b/third_party/libpg_query/src_backend_parser_gram.cpp
@@ -24277,7 +24277,7 @@ YYLTYPE yylloc = yyloc_default;
 
   case 364: /* CostDefault: %empty  */
 #line 573 "third_party/libpg_query/grammar/statements/pgq.y"
-                                                        { (yyval.ival) = NULL; }
+                                                        { (yyval.ival) = (int)NULL; }
 #line 24282 "third_party/libpg_query/grammar/grammar_out.cpp"
     break;