diff --git a/include/linux/pim.h b/include/linux/pim.h
index 6f689dc..236ffd31 100644
--- a/include/linux/pim.h
+++ b/include/linux/pim.h
@@ -3,6 +3,22 @@
 
 #include <asm/byteorder.h>
 
+#ifndef __KERNEL__
+struct pim {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+	__u8	pim_type:4,		/* PIM message type */
+		pim_ver:4;		/* PIM version */
+#elif defined(__BIG_ENDIAN_BITFIELD)
+	__u8	pim_ver:4;		/* PIM version */
+		pim_type:4;		/* PIM message type */
+#endif
+	__u8	pim_rsv;		/* Reserved */
+	__be16	pim_cksum;		/* Checksum */
+};
+
+#define PIM_MINLEN		8
+#endif
+
 /* Message types - V1 */
 #define PIM_V1_VERSION		__constant_htonl(0x10000000)
 #define PIM_V1_REGISTER		1