diff --git a/zebra/kernel_socket.c b/zebra/kernel_socket.c
index f290d456d6..48db481515 100644
--- a/zebra/kernel_socket.c
+++ b/zebra/kernel_socket.c
@@ -274,7 +274,7 @@ size_t _rta_get(caddr_t sap, void *destp, size_t destlen, bool checkaf)
 		if (sa->sa_family == AF_LINK) {
 			sdl = (struct sockaddr_dl *)sa;
 			if (sdl->sdl_index == 0 || sdl->sdl_nlen == 0)
-				copylen = sizeof(*sdl) - sizeof(sdl->sdl_data);
+				copylen = destlen;
 		}
 
 		if (copylen > destlen) {