diff --git a/networking/libiproute/libnetlink.c b/networking/libiproute/libnetlink.c
index 9d5c641..7e0ff1b 100644
--- a/networking/libiproute/libnetlink.c
+++ b/networking/libiproute/libnetlink.c
@@ -340,14 +340,14 @@
 	int len = RTA_LENGTH(4);
 	struct rtattr *rta;
 
-	if ((int)(NLMSG_ALIGN(n->nlmsg_len) + len) > maxlen) {
+	if ((int)(NLMSG_ALIGN(n->nlmsg_len + len)) > maxlen) {
 		return -1;
 	}
 	rta = (struct rtattr*)(((char*)n) + NLMSG_ALIGN(n->nlmsg_len));
 	rta->rta_type = type;
 	rta->rta_len = len;
 	move_to_unaligned32(RTA_DATA(rta), data);
-	n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + len;
+	n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len + len);
 	return 0;
 }
 
@@ -356,14 +356,14 @@
 	int len = RTA_LENGTH(alen);
 	struct rtattr *rta;
 
-	if ((int)(NLMSG_ALIGN(n->nlmsg_len) + len) > maxlen) {
+	if ((int)(NLMSG_ALIGN(n->nlmsg_len + len)) > maxlen) {
 		return -1;
 	}
 	rta = (struct rtattr*)(((char*)n) + NLMSG_ALIGN(n->nlmsg_len));
 	rta->rta_type = type;
 	rta->rta_len = len;
 	memcpy(RTA_DATA(rta), data, alen);
-	n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + len;
+	n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len + len);
 	return 0;
 }
 
@@ -372,14 +372,14 @@
 	int len = RTA_LENGTH(4);
 	struct rtattr *subrta;
 
-	if (RTA_ALIGN(rta->rta_len) + len > maxlen) {
+	if (RTA_ALIGN(rta->rta_len + len) > maxlen) {
 		return -1;
 	}
 	subrta = (struct rtattr*)(((char*)rta) + RTA_ALIGN(rta->rta_len));
 	subrta->rta_type = type;
 	subrta->rta_len = len;
 	move_to_unaligned32(RTA_DATA(subrta), data);
-	rta->rta_len = NLMSG_ALIGN(rta->rta_len) + len;
+	rta->rta_len = NLMSG_ALIGN(rta->rta_len + len);
 	return 0;
 }
 
@@ -388,14 +388,14 @@
 	struct rtattr *subrta;
 	int len = RTA_LENGTH(alen);
 
-	if (RTA_ALIGN(rta->rta_len) + len > maxlen) {
+	if (RTA_ALIGN(rta->rta_len + len) > maxlen) {
 		return -1;
 	}
 	subrta = (struct rtattr*)(((char*)rta) + RTA_ALIGN(rta->rta_len));
 	subrta->rta_type = type;
 	subrta->rta_len = len;
 	memcpy(RTA_DATA(subrta), data, alen);
-	rta->rta_len = NLMSG_ALIGN(rta->rta_len) + len;
+	rta->rta_len = NLMSG_ALIGN(rta->rta_len + len);
 	return 0;
 }