diff --git a/dlls/winsock/socket.c b/dlls/winsock/socket.c
index 2057eefbbde..de9ea97b7d8 100644
--- a/dlls/winsock/socket.c
+++ b/dlls/winsock/socket.c
@@ -729,7 +729,7 @@ static const struct sockaddr* ws_sockaddr_ws2u(const struct WS_sockaddr* wsaddr,
 
             *uaddrlen=sizeof(struct sockaddr_ipx);
             uipx=malloc(*uaddrlen);
-            memset(&uipx,0,sizeof(uipx));
+            memset(uipx,0,sizeof(*uipx));
             uipx->sipx_family=AF_IPX;
             uipx->sipx_port=wsipx->sa_socket;
             /* copy sa_netnum and sa_nodenum to sipx_network and sipx_node