diff --git a/src/gui/tray/ActivityData.cpp b/src/gui/tray/ActivityData.cpp
index 866c97956f..9378a65969 100644
--- a/src/gui/tray/ActivityData.cpp
+++ b/src/gui/tray/ActivityData.cpp
@@ -14,7 +14,7 @@
 
 #include <QtCore>
 
-#include "activitydata.h"
+#include "ActivityData.h"
 
 
 namespace OCC {