diff --git a/sys/arm/include/atomic.h b/sys/arm/include/atomic.h
index 72e198d3369..71e31c38e26 100644
--- a/sys/arm/include/atomic.h
+++ b/sys/arm/include/atomic.h
@@ -344,7 +344,8 @@ atomic_readandclear_32(volatile u_int32_t *p)
 
 #define atomic_clear_ptr		atomic_clear_32
 #define atomic_set_ptr			atomic_set_32
-#define atomic_cmpset_ptr		atomic_cmpset_32
+#define	atomic_cmpset_ptr(dst, old, new)	\
+    atomic_cmpset_32((volatile u_int *)(dst), (u_int)(old), (u_int)(new))
 #define atomic_cmpset_rel_ptr		atomic_cmpset_ptr
 #define atomic_cmpset_acq_ptr		atomic_cmpset_ptr
 #define atomic_store_ptr		atomic_store_32