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-rw-r--r--malloc/malloc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 8ec5f85800..57867c90c6 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -3764,7 +3764,7 @@ int mALLOPt(param_number, value) int param_number; int value;
    byte per chunk; still this will catch most cases of double frees or
    overruns. */
 
-#define MAGICBYTE(p) ( ( ((unsigned)p >> 3) ^ ((unsigned)p >> 11)) & 0xFF )
+#define MAGICBYTE(p) ( ( ((size_t)p >> 3) ^ ((size_t)p >> 11)) & 0xFF )
 
 /* Convert a pointer to be free()d or realloc()ed to a valid chunk
    pointer.  If the provided pointer is not valid, return NULL.  The