diff --git a/src/backends/libinput/device.cpp b/src/backends/libinput/device.cpp
index 19fe0349a7..abbd95d5c8 100644
--- a/src/backends/libinput/device.cpp
+++ b/src/backends/libinput/device.cpp
@@ -666,8 +666,10 @@ void Device::setOutput(Output *output)
 #ifndef KWIN_BUILD_TESTING
     m_output = output;
     if (m_output) {
+        m_outputName = output->name();
         writeEntry(ConfigKey::OutputName, output->name());
     } else {
+        m_outputName = QString();
         writeEntry(ConfigKey::OutputName, QString());
     }
     Q_EMIT outputNameChanged();