diff --git a/zebra/kernel_netlink.c b/zebra/kernel_netlink.c
index 37152c6254..ef7a891693 100644
--- a/zebra/kernel_netlink.c
+++ b/zebra/kernel_netlink.c
@@ -307,7 +307,8 @@ netlink_parse_rtattr (struct rtattr **tb, int max, struct rtattr *rta,
 }
 
 int
-addattr_l (struct nlmsghdr *n, unsigned int maxlen, int type, void *data, int alen)
+addattr_l (struct nlmsghdr *n, unsigned int maxlen, int type,
+	   void *data, unsigned int alen)
 {
   int len;
   struct rtattr *rta;
@@ -328,7 +329,7 @@ addattr_l (struct nlmsghdr *n, unsigned int maxlen, int type, void *data, int al
 
 int
 rta_addattr_l (struct rtattr *rta, unsigned int maxlen, int type,
-	       void *data, int alen)
+	       void *data, unsigned int alen)
 {
   unsigned int len;
   struct rtattr *subrta;
diff --git a/zebra/kernel_netlink.h b/zebra/kernel_netlink.h
index 0efd89f125..890236c047 100644
--- a/zebra/kernel_netlink.h
+++ b/zebra/kernel_netlink.h
@@ -29,9 +29,9 @@
 extern void netlink_parse_rtattr (struct rtattr **tb, int max,
                                   struct rtattr *rta, int len);
 extern int addattr_l (struct nlmsghdr *n, unsigned int maxlen,
-                      int type, void *data, int alen);
+                      int type, void *data, unsigned int alen);
 extern int rta_addattr_l (struct rtattr *rta, unsigned int maxlen,
-                          int type, void *data, int alen);
+                          int type, void *data, unsigned int alen);
 extern int addattr32 (struct nlmsghdr *n, unsigned int maxlen,
                       int type, int data);
 extern struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
diff --git a/zebra/zebra_fpm_netlink.c b/zebra/zebra_fpm_netlink.c
index 02880586b1..6543298605 100644
--- a/zebra/zebra_fpm_netlink.c
+++ b/zebra/zebra_fpm_netlink.c
@@ -323,7 +323,7 @@ static int
 netlink_route_info_encode (netlink_route_info_t *ri, char *in_buf,
 			   size_t in_buf_len)
 {
-  int bytelen;
+  size_t bytelen;
   int nexthop_num = 0;
   size_t buf_offset;
   netlink_nh_info_t *nhi;