diff --git a/src/plugins/platforms/drm/drm_output.cpp b/src/plugins/platforms/drm/drm_output.cpp
index 612581d35e..8a17a7c325 100644
--- a/src/plugins/platforms/drm/drm_output.cpp
+++ b/src/plugins/platforms/drm/drm_output.cpp
@@ -885,10 +885,3 @@ bool DrmOutput::setGammaRamp(const GammaRamp &gamma)
 }
 
 }
-
-QDebug& operator<<(QDebug& s, const KWin::DrmOutput *output)
-{
-    if (!output)
-        return s.nospace() << "DrmOutput()";
-    return s.nospace() << "DrmOutput(" << output->name() << ", crtc:" << output->crtc() << ", connector:" << output->connector() << ", geometry:" << output->geometry() << ')';
-}
diff --git a/src/plugins/platforms/drm/drm_output.h b/src/plugins/platforms/drm/drm_output.h
index 30059f82fb..d061dc30ff 100644
--- a/src/plugins/platforms/drm/drm_output.h
+++ b/src/plugins/platforms/drm/drm_output.h
@@ -177,7 +177,4 @@ private:
 
 Q_DECLARE_METATYPE(KWin::DrmOutput*)
 
-QDebug& operator<<(QDebug& stream, const KWin::DrmOutput *);
-
 #endif
-