diff --git a/ikvm_server.hpp b/ikvm_server.hpp
index b806201..ebe4ad2 100644
--- a/ikvm_server.hpp
+++ b/ikvm_server.hpp
@@ -32,6 +32,7 @@
          */
         ClientData(int s, Input* i) : skipFrame(s), input(i)
         {
+            needUpdate = false;
         }
         ~ClientData() = default;
         ClientData(const ClientData&) = default;
@@ -41,6 +42,7 @@
 
         int skipFrame;
         Input* input;
+        bool needUpdate;
     };
 
     /*
@@ -85,6 +87,15 @@
 
   private:
     /*
+     * @brief Handler for a client frame update message
+     *
+     * @param[in] cl - Handle to the client object
+     * @param[in] furMsg - Pointer of the FUR message
+     */
+    static void
+    clientFramebufferUpdateRequest(rfbClientPtr cl,
+                                   rfbFramebufferUpdateRequestMsg *furMsg);
+    /*
      * @brief Handler for a client disconnecting
      *
      * @param[in] cl - Handle to the client object