diff --git a/src/frontends/qt4/LayoutBox.cpp b/src/frontends/qt4/LayoutBox.cpp
index 55888d5ec1..c46ce45538 100644
--- a/src/frontends/qt4/LayoutBox.cpp
+++ b/src/frontends/qt4/LayoutBox.cpp
@@ -418,6 +418,11 @@ LayoutBox::LayoutBox(GuiView & owner)
 }
 
 
+LayoutBox::~LayoutBox() {
+	delete d;
+}
+
+
 void LayoutBox::Private::countCategories()
 {
 	int n = filterModel_->rowCount();
diff --git a/src/frontends/qt4/LayoutBox.h b/src/frontends/qt4/LayoutBox.h
index 493f931d1b..0b37e7e82a 100644
--- a/src/frontends/qt4/LayoutBox.h
+++ b/src/frontends/qt4/LayoutBox.h
@@ -35,6 +35,7 @@ class LayoutBox : public QComboBox
 	Q_OBJECT
 public:
 	LayoutBox(GuiView &);
+	~LayoutBox();
 
 	/// select the right layout in the combobox.
 	void set(docstring const & layout);