diff --git a/deps/lua/src/lua_cmsgpack.c b/deps/lua/src/lua_cmsgpack.c
index 90a388f3..ba75ed45 100644
--- a/deps/lua/src/lua_cmsgpack.c
+++ b/deps/lua/src/lua_cmsgpack.c
@@ -515,6 +515,9 @@ int mp_pack(lua_State *L) {
     if (nargs == 0)
         return luaL_argerror(L, 0, "MessagePack pack needs input.");
 
+    if (!lua_checkstack(L, nargs))
+        return luaL_argerror(L, 0, "Too many arguments for MessagePack pack.");
+
     buf = mp_buf_new(L);
     for(i = 1; i <= nargs; i++) {
         /* Copy argument i to top of stack for _encode processing;