diff --git a/src/core/renderloop.cpp b/src/core/renderloop.cpp
index 739b5ba2e6..9b4fe9f5ed 100644
--- a/src/core/renderloop.cpp
+++ b/src/core/renderloop.cpp
@@ -279,6 +279,9 @@ std::chrono::nanoseconds RenderLoop::nextPresentationTimestamp() const
 
 void RenderLoop::setPresentationMode(PresentationMode mode)
 {
+    if (mode != d->presentationMode) {
+        qCDebug(KWIN_CORE) << "Changed presentation mode to" << mode;
+    }
     d->presentationMode = mode;
 }