--- a/femon.c
+++ b/femon.c
@@ -139,7 +139,7 @@
         FemonService_v1_0 *data = (FemonService_v1_0*)Data;
         if (!cDevice::ActualDevice())
            return false;
-        cDvbDevice *dev = dynamic_cast<cDvbDevice*>(cDevice::ActualDevice());
+        cDvbDevice *dev = getDvbDevice(cDevice::ActualDevice());
         data->fe_name = getFrontendName(dev);
         data->fe_status = getFrontendStatus(dev);
         data->fe_snr = getSNR(dev);
@@ -198,9 +198,9 @@
 
 cString cPluginFemon::SVDRPCommand(const char *Command, const char *Option, int &ReplyCode)
 {
-  cDvbDevice *dev = dynamic_cast<cDvbDevice*>(cDevice::ActualDevice());
+  cDvbDevice *dev = getDvbDevice(cDevice::ActualDevice());
   if (*Option && isnumber(Option)) {
-     cDvbDevice *dev2 = dynamic_cast<cDvbDevice*>(cDevice::GetDevice(int(strtol(Option, NULL, 10))));
+     cDvbDevice *dev2 = getDvbDevice(cDevice::GetDevice(int(strtol(Option, NULL, 10))));
      if (dev2)
         dev = dev2;
      }
--- a/femonosd.c
+++ b/femonosd.c
@@ -674,7 +674,7 @@
      }
 
   if (m_DeviceSource == DEVICESOURCE_DVBAPI) {
-     cDvbDevice *dev = dynamic_cast<cDvbDevice*>(cDevice::ActualDevice());
+     cDvbDevice *dev = getDvbDevice(cDevice::ActualDevice());
      m_Frontend = dev ? open(*cString::sprintf(FRONTEND_DEVICE, dev->Adapter(), dev->Frontend()), O_RDONLY | O_NONBLOCK) : -1;
      if (m_Frontend >= 0) {
         if (ioctl(m_Frontend, FE_GET_INFO, &m_FrontendInfo) < 0) {
@@ -748,7 +748,7 @@
      }
 
   if (m_DeviceSource == DEVICESOURCE_DVBAPI) {
-     cDvbDevice *dev = dynamic_cast<cDvbDevice*>(cDevice::ActualDevice());
+     cDvbDevice *dev = getDvbDevice(cDevice::ActualDevice());
      m_Frontend = dev ? open(*cString::sprintf(FRONTEND_DEVICE, dev->Adapter(), dev->Frontend()), O_RDONLY | O_NONBLOCK) : -1;
      if (m_Frontend >= 0) {
         if (ioctl(m_Frontend, FE_GET_INFO, &m_FrontendInfo) < 0) {
--- a/femontools.c
+++ b/femontools.c
@@ -589,3 +589,14 @@
 
   SkipBits(n);
 }
+
+
+cDvbDevice*  getDvbDevice(cDevice* device)
+{
+  cDvbDevice *dev = dynamic_cast<cDvbDevice*>(device);
+#ifdef __DYNAMIC_DEVICE_PROBE
+  if ((dev == NULL) && (device != NULL) && device->HasSubDevice())
+     dev = dynamic_cast<cDvbDevice*>(device->SubDevice());
+#endif
+  return dev;
+}
--- a/femontools.h
+++ b/femontools.h
@@ -83,4 +83,6 @@
   void           SkipSeGolomb() { SkipGolomb(); }
   };
 
+cDvbDevice*  getDvbDevice(cDevice* device);
+
 #endif // __FEMONTOOLS_H