diff --git a/sys/alpha/include/atomic.h b/sys/alpha/include/atomic.h
index 93cdbf6b16a3..f5dd718d8661 100644
--- a/sys/alpha/include/atomic.h
+++ b/sys/alpha/include/atomic.h
@@ -356,7 +356,9 @@ atomic_cmpset_32(volatile u_int32_t* p, u_int32_t cmpval, u_int32_t newval)
 
 	__asm __volatile (
 		"1:\tldl_l %0, %4\n\t"		/* load old value */
+#ifdef notyet
 		"zapnot  %0,0xf,%0\n\t"		/* Chop of signed bits */
+#endif
 		"cmpeq %0, %2, %0\n\t"		/* compare */
 		"beq %0, 2f\n\t"		/* exit if not equal */
 		"mov %3, %0\n\t"		/* value to store */