diff --git a/tool/transform_mjit_header.rb b/tool/transform_mjit_header.rb
index 74d4e06232..848512c58a 100644
--- a/tool/transform_mjit_header.rb
+++ b/tool/transform_mjit_header.rb
@@ -32,7 +32,7 @@ module MJITHeader
   ]
 
   IGNORED_FUNCTIONS = [
-    'vm_search_method_slowpath', # This increases the time to compile when inlined. So we use it as external function.
+    'rb_vm_search_method_slowpath', # This increases the time to compile when inlined. So we use it as external function.
     'rb_equal_opt', # Not used from VM and not compilable
   ]