Index: src/atomic.h
==================================================================
--- src/atomic.h
+++ src/atomic.h
@@ -115,11 +115,11 @@
 	    : "r"(i), "m"(*p)
 	);
 
 	return (void*)i;
 #elif defined(OF_HAVE_GCC_ATOMIC_OPS)
-	return __sync_add_and_fetch(p, i);
+	return __sync_add_and_fetch(p, (void*)i);
 #elif defined(OF_HAVE_OSATOMIC)
 	if (sizeof(void*) == 4)
 		return (void*)OSAtomicAdd32Barrier(i, (int32_t*)p);
 # ifdef OF_HAVE_OSATOMIC_64
 	else if (sizeof(void*) == 8)
@@ -223,11 +223,11 @@
 	    : "r"(i), "m"(*p)
 	);
 
 	return (void*)i;
 #elif defined(OF_HAVE_GCC_ATOMIC_OPS)
-	return __sync_sub_and_fetch(p, i);
+	return __sync_sub_and_fetch(p, (void*)i);
 #elif defined(OF_HAVE_OSATOMIC)
 	if (sizeof(void*) == 4)
 		return (void*)OSAtomicAdd32Barrier(-i, (int32_t*)p);
 # ifdef OF_HAVE_OSATOMIC_64
 	else if (sizeof(void*) == 8)