diff --git a/device.c b/device.c
index 3a05c77..c9c8ab0 100644
--- a/device.c
+++ b/device.c
@@ -179,6 +179,18 @@ cString cIptvDevice::GetInformation(unsigned int Page)
   return info;
 }
 
+int cIptvDevice::SignalStrength(void) const
+{
+  debug("cIptvDevice::SignalStrength(%d)\n", deviceIndex);
+  return (100);
+}
+
+int cIptvDevice::SignalQuality(void) const
+{
+  debug("cIptvDevice::SignalQuality(%d)\n", deviceIndex);
+  return (100);
+}
+
 bool cIptvDevice::ProvidesSource(int Source) const
 {
   debug("cIptvDevice::ProvidesSource(%d)\n", deviceIndex);
diff --git a/device.h b/device.h
index 8a8ec9f..5bc9b97 100644
--- a/device.h
+++ b/device.h
@@ -75,6 +75,10 @@ private:
   bool DeleteFilter(unsigned int Index);
   bool IsBlackListed(u_short Pid, u_char Tid, u_char Mask) const;
 
+  // for channel info
+  virtual int SignalStrength(void) const;
+  virtual int SignalQuality(void) const;
+
   // for channel selection
 public:
   virtual bool ProvidesSource(int Source) const;
diff --git a/iptv.c b/iptv.c
index 89c43aa..ec9c0d5 100644
--- a/iptv.c
+++ b/iptv.c
@@ -12,8 +12,8 @@
 #include "setup.h"
 #include "device.h"
 
-#if defined(APIVERSNUM) && APIVERSNUM < 10715
-#error "VDR-1.7.15 API version or greater is required!"
+#if defined(APIVERSNUM) && APIVERSNUM < 10719
+#error "VDR-1.7.19 API version or greater is required!"
 #endif
 
        const char VERSION[]     = "0.4.3";