diff --git a/slirp/tcp_input.c b/slirp/tcp_input.c
index c5063a9..e7f9c6b 100644
--- a/slirp/tcp_input.c
+++ b/slirp/tcp_input.c
@@ -234,6 +234,8 @@
 	struct sockaddr_in6 *lhost6, *fhost6;
     struct ex_list *ex_ptr;
     Slirp *slirp;
+    memset(&lhost, 0, sizeof(lhost));
+    memset(&fhost, 0, sizeof(lhost));
 
 	DEBUG_CALL("tcp_input");
 	DEBUG_ARGS((dfd, " m = %p  iphlen = %2d  inso = %p\n",