diff --git a/x0vncserver/PollingScheduler.h b/x0vncserver/PollingScheduler.h
index 777a665..ba7b27d 100644
--- a/x0vncserver/PollingScheduler.h
+++ b/x0vncserver/PollingScheduler.h
@@ -17,7 +17,10 @@
  */
 
 //
-// PollingScheduler.h
+// PollingScheduler class. It is used for deciding when to start new
+// polling pass, and how much time it is ok to wait before starting. 
+// PollingScheduler is provided a desired polling interval and watches
+// for actual intervals between past polling cycles.
 //
 
 #ifndef __POLLINGSCHEDULER_H__
@@ -43,6 +46,9 @@
   // This function estimates time remaining before new polling pass.
   int millisRemaining() const;
 
+  // This function tells if it's ok to start polling pass right now.
+  bool goodTimeToPoll() const;
+
 protected:
 
   bool initialState;