diff --git a/sys/netproto/smb/smb_trantcp.c b/sys/netproto/smb/smb_trantcp.c
index 304c85f..7d08a1a 100644
--- a/sys/netproto/smb/smb_trantcp.c
+++ b/sys/netproto/smb/smb_trantcp.c
@@ -255,6 +255,9 @@
 			error = ECONNABORTED;
 			break;
 		}
+		bzero(&sin, sizeof(sin));
+		sin.sin_len = sizeof(sin);
+		sin.sin_family = AF_INET;
 		md_get_mem(mdp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM);
 		md_get_uint16(mdp, &port);
 		sin.sin_port = port;