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-rw-r--r--internal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index de435ac16b..116654ef91 100644
--- a/internal.h
+++ b/internal.h
@@ -931,6 +931,7 @@ VALUE rb_singleton_class_get(VALUE obj);
void Init_class_hierarchy(void);
int rb_class_has_methods(VALUE c);
+void rb_undef_methods_from(VALUE klass, VALUE super);
/* compar.c */
VALUE rb_invcmp(VALUE, VALUE);