1 files changed, 1 insertions, 1 deletions
diff --git a/intern.h b/intern.h
index 6776216c40..0b73d7461d 100644
--- a/intern.h
+++ b/intern.h
@@ -121,7 +121,7 @@ void rb_define_private_method _((VALUE, const char*, VALUE (*)(ANYARGS), int));
 void rb_define_singleton_method _((VALUE, const char*, VALUE(*)(ANYARGS), int));
 VALUE rb_singleton_class _((VALUE));
 /* compar.c */
-int rb_cmpint _((VALUE));
+int rb_cmpint _((VALUE, VALUE, VALUE));
 NORETURN(void rb_cmperr _((VALUE, VALUE)));
 /* enum.c */
 /* error.c */