diff --git a/unix/vncviewer/vncviewer.cxx b/unix/vncviewer/vncviewer.cxx
index 4a47788..203df9a 100644
--- a/unix/vncviewer/vncviewer.cxx
+++ b/unix/vncviewer/vncviewer.cxx
@@ -218,7 +218,7 @@
   if (**vncServerName != '\0')
     *remoteHost = *vncServerName;
 
-  *gatewayHost = strDup (via.getValueStr ());
+  *gatewayHost = safe_strdup (via.getValueStr ());
   *vncServerName = new char[50];
   sprintf (*vncServerName, "localhost::%d", localPort);
 }