diff --git a/apps/opencs/view/prefs/dialogue.cpp b/apps/opencs/view/prefs/dialogue.cpp
index 97a36306f..f04092653 100644
--- a/apps/opencs/view/prefs/dialogue.cpp
+++ b/apps/opencs/view/prefs/dialogue.cpp
@@ -71,6 +71,12 @@ CSVPrefs::Dialogue::Dialogue()
     buildContentArea (main);
 }
 
+CSVPrefs::Dialogue::~Dialogue()
+{
+    if (isVisible())
+        CSMPrefs::State::get().save();
+}
+
 void CSVPrefs::Dialogue::closeEvent (QCloseEvent *event)
 {
     QMainWindow::closeEvent (event);
diff --git a/apps/opencs/view/prefs/dialogue.hpp b/apps/opencs/view/prefs/dialogue.hpp
index 3965800db..fc66892c8 100644
--- a/apps/opencs/view/prefs/dialogue.hpp
+++ b/apps/opencs/view/prefs/dialogue.hpp
@@ -31,6 +31,8 @@ namespace CSVPrefs
 
             Dialogue();
 
+            virtual ~Dialogue();
+
         protected:
 
             void closeEvent (QCloseEvent *event);