1 files changed, 1 insertions, 0 deletions
diff --git a/intern.h b/intern.h
index 86ff7bdb48..ece4990843 100644
--- a/intern.h
+++ b/intern.h
@@ -307,6 +307,7 @@ VALUE rb_obj_freeze _((VALUE));
 VALUE rb_obj_id _((VALUE));
 VALUE rb_obj_class _((VALUE));
 VALUE rb_class_real _((VALUE));
+VALUE rb_class_inherited_p _((VALUE, VALUE));
 VALUE rb_convert_type _((VALUE,int,const char*,const char*));
 VALUE rb_check_convert_type _((VALUE,int,const char*,const char*));
 VALUE rb_to_int _((VALUE));