1 files changed, 1 insertions, 0 deletions

diff --git a/src/lj_def.h b/src/lj_def.h
index 8128aa21..872a7830 100644
--- a/src/lj_def.h
+++ b/src/lj_def.h
@@ -89,6 +89,7 @@ typedef unsigned __int32 uintptr_t;
 #define checku8(x)      ((x) == (int32_t)(uint8_t)(x))
 #define checki16(x)     ((x) == (int32_t)(int16_t)(x))
 #define checku16(x)     ((x) == (int32_t)(uint16_t)(x))
+#define checkptr32(x)   ((uintptr_t)(x) == (uint32_t)(uintptr_t)(x))
 
 /* Every half-decent C compiler transforms this into a rotate instruction. */
 #define lj_rol(x, n)    (((x)<<(n)) | ((x)>>(32-(n))))