diff --git a/libvncserver/rfbserver.c b/libvncserver/rfbserver.c
index 133007d..c86d7ca 100644
--- a/libvncserver/rfbserver.c
+++ b/libvncserver/rfbserver.c
@@ -629,6 +629,7 @@ rfbProcessClientProtocolVersion(rfbClientPtr cl)
      * maintaining RFB version compatibility across multiple servers is a pain
      * Should use something like ServerIdentity encoding
      */
+    cl->protocolMajorVersion = major_;
     cl->protocolMinorVersion = minor_;
     
     rfbLog("Protocol version sent %d.%d, using %d.%d\n",
diff --git a/rfb/rfb.h b/rfb/rfb.h
index 1aef85a..b664efe 100644
--- a/rfb/rfb.h
+++ b/rfb/rfb.h
@@ -421,6 +421,7 @@ typedef struct _rfbClientRec {
     char *host;
 
     /* RFB protocol minor version number */
+    int protocolMajorVersion;
     int protocolMinorVersion;
 
 #ifdef LIBVNCSERVER_HAVE_LIBPTHREAD