diff --git a/conf/dlgaccessibility.cpp b/conf/dlgaccessibility.cpp
index 007194379..b1ad66e47 100644
--- a/conf/dlgaccessibility.cpp
+++ b/conf/dlgaccessibility.cpp
@@ -14,6 +14,6 @@
 DlgAccessibility::DlgAccessibility( QWidget * parent )
     : QWidget( parent )
 {
-    Ui_DlgAccessibilityBase *dlg = new Ui_DlgAccessibilityBase();
-    dlg->setupUi( this );
+    Ui_DlgAccessibilityBase dlg;
+    dlg.setupUi( this );
 }
diff --git a/conf/dlggeneral.cpp b/conf/dlggeneral.cpp
index 076800bc1..80478e635 100644
--- a/conf/dlggeneral.cpp
+++ b/conf/dlggeneral.cpp
@@ -22,6 +22,11 @@ DlgGeneral::DlgGeneral( QWidget * parent )
     m_dlg->setupUi( this );
 }
 
+DlgGeneral::~DlgGeneral()
+{
+    delete m_dlg;
+}
+
 void DlgGeneral::showEvent( QShowEvent * )
 {
 #if OKULAR_FORCE_DRM
diff --git a/conf/dlggeneral.h b/conf/dlggeneral.h
index 84a81f497..1ee27683d 100644
--- a/conf/dlggeneral.h
+++ b/conf/dlggeneral.h
@@ -18,6 +18,7 @@ class DlgGeneral : public QWidget
 {
     public:
         DlgGeneral( QWidget * parent = 0 );
+        virtual ~DlgGeneral();
 
     protected:
         virtual void showEvent( QShowEvent * );
diff --git a/conf/dlgperformance.cpp b/conf/dlgperformance.cpp
index a9e173d52..7573ccb0e 100644
--- a/conf/dlgperformance.cpp
+++ b/conf/dlgperformance.cpp
@@ -30,6 +30,11 @@ DlgPerformance::DlgPerformance( QWidget * parent )
     connect( m_dlg->kcfg_MemoryLevel, SIGNAL( changed( int ) ), this, SLOT( radioGroup_changed( int ) ) );
 }
 
+DlgPerformance::~DlgPerformance()
+{
+    delete m_dlg;
+}
+
 void DlgPerformance::radioGroup_changed( int which )
 {
     switch ( which )
diff --git a/conf/dlgperformance.h b/conf/dlgperformance.h
index d45cdc462..639e3efe4 100644
--- a/conf/dlgperformance.h
+++ b/conf/dlgperformance.h
@@ -20,6 +20,7 @@ class DlgPerformance : public QWidget
 
     public:
         DlgPerformance( QWidget * parent = 0 );
+        virtual ~DlgPerformance();
 
     protected slots:
         void radioGroup_changed( int which );