diff --git a/DeviceSource.cpp b/DeviceSource.cpp
index 300c1f9..7ce37f9 100644
--- a/DeviceSource.cpp
+++ b/DeviceSource.cpp
@@ -469,6 +469,7 @@ void DeviceSource::setDevice(const std::string &devicename)
         ready_ = false;
     }
     else {
+        unplugged_ = true;
         Log::Warning("No such device '%s'", device_.c_str());
     }
 }