diff --git a/HISTORY b/HISTORY
index 96bb984..b38b73c 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,6 +1,7 @@
 VDR Plugin 'streamdev' Revision History
 ---------------------------------------
 
+- added cDevice::NumProvidedSystems() which was introduced in VDR 1.7.0
 - added namespace to remuxers
 - increased WRITERBUFSIZE - buffer was too small for high bandwidth content
 - removed cStreamdevStreamer::m_Running
diff --git a/client/device.h b/client/device.h
index 8263fa5..e96b05f 100644
--- a/client/device.h
+++ b/client/device.h
@@ -1,5 +1,5 @@
 /*
- *  $Id: device.h,v 1.8 2008/10/02 07:14:47 schmirl Exp $
+ *  $Id: device.h,v 1.9 2009/06/23 10:26:54 schmirl Exp $
  */
  
 #ifndef VDR_STREAMDEV_DEVICE_H
@@ -54,6 +54,9 @@ public:
 	virtual bool ProvidesTransponder(const cChannel *Channel) const;
 	virtual bool ProvidesChannel(const cChannel *Channel, int Priority = -1,
 			bool *NeedsDetachReceivers = NULL) const;
+#if APIVERSNUM >= 10700
+	virtual int NumProvidedSystems(void) const { return 1; }
+#endif
 	virtual bool IsTunedToTransponder(const cChannel *Channel);
 
 	static bool Init(void);