diff --git a/src/app/qgscustomization.cpp b/src/app/qgscustomization.cpp
index b74b510d9af..70f0eef6984 100644
--- a/src/app/qgscustomization.cpp
+++ b/src/app/qgscustomization.cpp
@@ -278,7 +278,8 @@ void QgsCustomizationDialog::cancel()
   {
     for ( int i = 0; i < mSelectedWidgets.size(); i++ )
     {
-      mSelectedWidgets.at( i )->setStyleSheet( mSelectedWidgets.at( i )->property( "originalStylesheet" ).toString() );
+      if ( QWidget* widget = mSelectedWidgets.at( i ) )
+        widget->setStyleSheet( mSelectedWidgets.at( i )->property( "originalStylesheet" ).toString() );
     }
     mSelectedWidgets.clear();
   }