diff --git a/depends/lua/src/lapi.c b/depends/lua/src/lapi.c
index 711895b39..aa01148ab 100644
--- a/depends/lua/src/lapi.c
+++ b/depends/lua/src/lapi.c
@@ -395,7 +395,7 @@ LUA_API size_t lua_rawlen (lua_State *L, int idx) {
     case LUA_TSHRSTR: return tsvalue(o)->shrlen;
     case LUA_TLNGSTR: return tsvalue(o)->u.lnglen;
     case LUA_TUSERDATA: return uvalue(o)->len;
-    case LUA_TTABLE: return luaH_getn(hvalue(o));
+    case LUA_TTABLE: return size_t(luaH_getn(hvalue(o)));
     default: return 0;
   }
 }