1 files changed, 5 insertions, 0 deletions

diff --git a/lua_cjson.c b/lua_cjson.c
index 9de3f5a..2a69699 100644
--- a/lua_cjson.c
+++ b/lua_cjson.c
@@ -93,9 +93,14 @@
 #define strcasecmp _stricmp
 #endif
 
+#if LONG_MAX > ((1UL << 31) - 1)
 #define json_lightudata_mask(ludata)                                         \
     ((void *) ((uintptr_t) (ludata) & ((1UL << 47) - 1)))
 
+#else
+#define json_lightudata_mask(ludata)    (ludata)
+#endif
+
 static const char * const *json_empty_array;
 static const char * const *json_array;