diff --git a/src/tests/kits/net/tcp_tester.cpp b/src/tests/kits/net/tcp_tester.cpp
index c734f077a6..68a907c7d7 100644
--- a/src/tests/kits/net/tcp_tester.cpp
+++ b/src/tests/kits/net/tcp_tester.cpp
@@ -1067,6 +1067,7 @@ setup_server()
 {
 	sockaddr_in address;
 	memset(&address, 0, sizeof(address));
+	address.sin_len = sizeof(sockaddr_in);
 	address.sin_family = AF_INET;
 	address.sin_port = htons(1024);
 	address.sin_addr.s_addr = INADDR_ANY;