@@ -21,11 +21,11 @@
 #import "OFObject.h"
 
 #ifdef OF_THREADS
 # import "threading.h"
 # define NUM_SPINLOCKS 8	/* needs to be a power of 2 */
-# define SPINLOCK_HASH(p) ((uintptr_t)p >> 4) & (NUM_SPINLOCKS - 1)
+# define SPINLOCK_HASH(p) ((unsigned)((uintptr_t)p >> 4) & (NUM_SPINLOCKS - 1))
 static of_spinlock_t spinlocks[NUM_SPINLOCKS];
 #endif
 
 BOOL
 objc_properties_init(void)