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-rw-r--r--internal.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index 971d6bde87..8630b8bbf3 100644
--- a/internal.h
+++ b/internal.h
@@ -66,6 +66,9 @@ VALUE rb_special_singleton_class(VALUE);
VALUE rb_singleton_class_clone_and_attach(VALUE obj, VALUE attach);
void Init_class_hierarchy(void);
+/* compar.c */
+VALUE rb_invcmp(VALUE, VALUE);
+
/* compile.c */
int rb_dvar_defined(ID);
int rb_local_defined(ID);