1 files changed, 1 insertions, 0 deletions

diff --git a/method.h b/method.h
index cd59963236..6bc494f4b0 100644
--- a/method.h
+++ b/method.h
@@ -75,6 +75,7 @@ typedef struct rb_callable_method_entry_struct { /* same fields with rb_method_e
 #define METHOD_ENTRY_CACHED_SET(me)          ((me)->flags |= IMEMO_FL_USER4)
 #define METHOD_ENTRY_INVALIDATED(me)         ((me)->flags & IMEMO_FL_USER5)
 #define METHOD_ENTRY_INVALIDATED_SET(me)     ((me)->flags |= IMEMO_FL_USER5)
+#define METHOD_ENTRY_CACHEABLE(me)           !(METHOD_ENTRY_VISI(me) == METHOD_VISI_PROTECTED)
 
 static inline void
 METHOD_ENTRY_VISI_SET(rb_method_entry_t *me, rb_method_visibility_t visi)