diff --git a/libvncclient/rfbproto.c b/libvncclient/rfbproto.c
index ac2a983..26c4e7a 100644
--- a/libvncclient/rfbproto.c
+++ b/libvncclient/rfbproto.c
@@ -1253,6 +1253,7 @@ SetFormatAndEncodings(rfbClient* client)
   if (!SupportsClient2Server(client, rfbSetEncodings)) return TRUE;
 
   se->type = rfbSetEncodings;
+  se->pad = 0;
   se->nEncodings = 0;
 
   if (client->appData.encodingsString) {