diff --git a/include/ircd/util.h b/include/ircd/util.h
index 185949650..0f9a44b7b 100644
--- a/include/ircd/util.h
+++ b/include/ircd/util.h
@@ -522,7 +522,10 @@ struct va_rtti
 	,argc
 	{
 		sizeof...(args)
-	}{}
+	}
+	{
+		assert(argc <= 8);
+	}
 };