1 files changed, 1 insertions, 1 deletions

diff --git a/lua_cjson.c b/lua_cjson.c
index 4b1915a..b46e915 100644
--- a/lua_cjson.c
+++ b/lua_cjson.c
@@ -501,7 +501,7 @@ static int lua_array_length(lua_State *l, json_config_t *cfg)
     /* table, startkey */
     while (lua_next(l, -2) != 0) {
         /* table, key, value */
-        if (lua_isnumber(l, -2) &&
+        if (lua_type(l, -2) == LUA_TNUMBER &&
             (k = lua_tonumber(l, -2))) {
             /* Integer >= 1 ? */
             if (floor(k) == k && k >= 1) {