diff --git a/client/deps/liblua/ltablib.c b/client/deps/liblua/ltablib.c
index db8ee7f62..9d9be1077 100644
--- a/client/deps/liblua/ltablib.c
+++ b/client/deps/liblua/ltablib.c
@@ -4,7 +4,7 @@
 ** See Copyright Notice in lua.h
 */
 
-
+#include <limits.h>
 #include <stddef.h>
 
 #define ltablib_c
@@ -134,14 +134,18 @@ static int pack(lua_State *L) {
 
 
 static int unpack(lua_State *L) {
-    int i, e, n;
+    int i, e;
+    unsigned int n;
     luaL_checktype(L, 1, LUA_TTABLE);
     i = luaL_optint(L, 2, 1);
     e = luaL_opt(L, luaL_checkint, 3, luaL_len(L, 1));
     if (i > e) return 0;  /* empty range */
-    n = e - i + 1;  /* number of elements */
-    if (n <= 0 || !lua_checkstack(L, n))  /* n <= 0 means arith. overflow */
+
+    n = (unsigned int)e - (unsigned int)i;  /* number of elements minus 1 */
+
+    if (n > (INT_MAX - 10) || !lua_checkstack(L, ++n))
         return luaL_error(L, "too many results to unpack");
+
     lua_rawgeti(L, 1, i);  /* push arg[i] (avoiding overflow problems) */
     while (i++ < e)  /* push arg[i + 1...e] */
         lua_rawgeti(L, 1, i);