diff --git a/include/linux/pim.h b/include/linux/pim.h
index 1ba0661..252bf66 100644
--- a/include/linux/pim.h
+++ b/include/linux/pim.h
@@ -4,14 +4,14 @@
 #include <asm/byteorder.h>
 
 /* Message types - V1 */
-#define PIM_V1_VERSION		__constant_htonl(0x10000000)
+#define PIM_V1_VERSION		cpu_to_be32(0x10000000)
 #define PIM_V1_REGISTER		1
 
 /* Message types - V2 */
 #define PIM_VERSION		2
 #define PIM_REGISTER		1
 
-#define PIM_NULL_REGISTER	__constant_htonl(0x40000000)
+#define PIM_NULL_REGISTER	cpu_to_be32(0x40000000)
 
 /* PIMv2 register message header layout (ietf-draft-idmr-pimvsm-v2-00.ps */
 struct pimreghdr