diff --git a/src/layouts/QskGridBox.cpp b/src/layouts/QskGridBox.cpp
index 6bb4d914..5dbe302a 100644
--- a/src/layouts/QskGridBox.cpp
+++ b/src/layouts/QskGridBox.cpp
@@ -130,7 +130,7 @@ int QskGridBox::addItem( QQuickItem* item,
 int QskGridBox::addItem( QQuickItem* item,
     int row, int column, int rowSpan, int columnSpan )
 {
-    if ( item == nullptr || row < 0 || column < 0 )
+    if ( item == nullptr || item == this || row < 0 || column < 0 )
         return -1;
 
     if ( qskIsTransparentForPositioner( item ) )
diff --git a/src/layouts/QskLinearBox.cpp b/src/layouts/QskLinearBox.cpp
index 9c965fa3..5cd1ecc2 100644
--- a/src/layouts/QskLinearBox.cpp
+++ b/src/layouts/QskLinearBox.cpp
@@ -393,7 +393,7 @@ int QskLinearBox::insertItem(
 
 int QskLinearBox::insertItem( int index, QQuickItem* item )
 {
-    if ( item == nullptr )
+    if ( item == nullptr || item == this )
         return -1;
 
     if ( qskIsTransparentForPositioner( item ) )
diff --git a/src/layouts/QskStackBox.cpp b/src/layouts/QskStackBox.cpp
index d7f93657..dbec8c2b 100644
--- a/src/layouts/QskStackBox.cpp
+++ b/src/layouts/QskStackBox.cpp
@@ -185,7 +185,7 @@ void QskStackBox::addItem( QQuickItem* item, Qt::Alignment alignment )
 
 void QskStackBox::insertItem( int index, QQuickItem* item )
 {
-    if ( item == nullptr )
+    if ( item == nullptr || item == this )
         return;
 
     reparentItem( item );