1 files changed, 1 insertions, 1 deletions
diff --git a/internal/imemo.h b/internal/imemo.h
index ef07333a58..8d506dda7d 100644
--- a/internal/imemo.h
+++ b/internal/imemo.h
@@ -82,7 +82,7 @@ struct vm_ifunc_argc {
 /*! IFUNC (Internal FUNCtion) */
 struct vm_ifunc {
     VALUE flags;
-    VALUE reserved;
+    struct rb_control_frame_struct *owner_cfp;
     rb_block_call_func_t func;
     const void *data;
     struct vm_ifunc_argc argc;