diff --git a/src/graphic/QskGraphicProviderMap.cpp b/src/graphic/QskGraphicProviderMap.cpp
index b60112bf..6121e169 100644
--- a/src/graphic/QskGraphicProviderMap.cpp
+++ b/src/graphic/QskGraphicProviderMap.cpp
@@ -28,9 +28,13 @@ QskGraphicProviderMap::QskGraphicProviderMap()
 
 QskGraphicProviderMap::~QskGraphicProviderMap()
 {
-    const auto& hashTab = m_data->hashTab;
-    for ( auto it = hashTab.constBegin(); it != hashTab.constEnd(); ++it )
-        delete it.value();
+    qDeleteAll( m_data->hashTab );
+}
+
+void QskGraphicProviderMap::clear()
+{
+    qDeleteAll( m_data->hashTab );
+    m_data->hashTab.clear();
 }
 
 void QskGraphicProviderMap::insert(
diff --git a/src/graphic/QskGraphicProviderMap.h b/src/graphic/QskGraphicProviderMap.h
index 30952172..8fd2211b 100644
--- a/src/graphic/QskGraphicProviderMap.h
+++ b/src/graphic/QskGraphicProviderMap.h
@@ -23,8 +23,9 @@ class QskGraphicProviderMap
     void remove( const QString& providerId );
     void remove( QskGraphicProvider* );
 
-    QskGraphicProvider* take( const QString& providerId );
+    void clear();
 
+    QskGraphicProvider* take( const QString& providerId );
     QskGraphicProvider* provider( const QString& providerId ) const;
 
     int size() const;