diff --git a/src/unix/dialup.cpp b/src/unix/dialup.cpp
index 78b09aa9b8..14122eb2c1 100644
--- a/src/unix/dialup.cpp
+++ b/src/unix/dialup.cpp
@@ -559,6 +559,7 @@ wxDialUpManagerImpl::NetConnection wxDialUpManagerImpl::CheckConnect()
    serv_addr.sin_family = hp->h_addrtype;
    memcpy(&serv_addr.sin_addr,hp->h_addr, hp->h_length);
    serv_addr.sin_port = htons(m_BeaconPort);
+   memset(&serv_addr.sin_zero, 0, sizeof(serv_addr.sin_zero));
 
    int sockfd;
    if( ( sockfd = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0)