diff --git a/src/app/qgisapp.cpp b/src/app/qgisapp.cpp
index c9ab29deae9..937cd29c6d5 100644
--- a/src/app/qgisapp.cpp
+++ b/src/app/qgisapp.cpp
@@ -149,6 +149,7 @@
 #include "qgsmapcanvas.h"
 #include "qgsmaplayer.h"
 #include "qgsmaplayerregistry.h"
+#include "qgsmaplayerstyleguiutils.h"
 #include "qgsmapoverviewcanvas.h"
 #include "qgsmaprenderer.h"
 #include "qgsmapsettings.h"
@@ -896,6 +897,8 @@ QgisApp::~QgisApp()
   delete QgsProject::instance();
 
   delete mPythonUtils;
+
+  QgsMapLayerStyleGuiUtils::cleanup();
 }
 
 void QgisApp::dragEnterEvent( QDragEnterEvent *event )