Index: uspace/lib/libc/include/atomicdflt.h
===================================================================
--- uspace/lib/libc/include/atomicdflt.h	(revision 034bf0e27f6439c8ee9425abd454c308f7f0ea84)
+++ uspace/lib/libc/include/atomicdflt.h	(revision 812355884f3878eb249907e2c43d2db6a913e1ff)
@@ -56,8 +56,10 @@
 }
 
+#ifndef CAS 
 static inline bool cas(atomic_t *val, long ov, long nv)
 {
 	return __sync_bool_compare_and_swap(&val->count, ov, nv);
 }
+#endif
 
 #endif