diff --git a/src/Gui/Application.cpp b/src/Gui/Application.cpp
index fa233c9ce9..e0ce35be61 100644
--- a/src/Gui/Application.cpp
+++ b/src/Gui/Application.cpp
@@ -170,6 +170,7 @@ struct ApplicationP
     ~ApplicationP()
     {
         delete macroMngr;
+        delete prefPackManager;
     }
 
     /// list of all handled documents