diff --git a/frontends/ast/ast.h b/frontends/ast/ast.h
index b60cae247..f83e02964 100644
--- a/frontends/ast/ast.h
+++ b/frontends/ast/ast.h
@@ -467,7 +467,7 @@ namespace AST_INTERNAL
 	                           AST::AstNode *original_ast = nullptr);
 }
 
-#define ASTNODE_GC
+#undef ASTNODE_GC
 #ifdef ASTNODE_GC
 struct Tagger {
 	std::set<AST::AstNode*> nodes;