diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 18f115a..1c82b94 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -1520,7 +1520,8 @@
 typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *,
 			      unsigned int);
 
-static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b,
+static inline int xfrm_addr_cmp(const xfrm_address_t *a,
+				const xfrm_address_t *b,
 				int family)
 {
 	switch (family) {