diff --git a/common/rfb/VNCServerST.h b/common/rfb/VNCServerST.h
index 81ad4ec..213f6b1 100644
--- a/common/rfb/VNCServerST.h
+++ b/common/rfb/VNCServerST.h
@@ -238,6 +238,7 @@
 
     bool needRenderedCursor();
     void checkUpdate();
+    void checkVideoUpdate();
 
     SSecurityFactory* securityFactory;
     QueryConnectionHandler* queryConnectionHandler;