diff --git a/tilinglayouts/columns/columns.cpp b/tilinglayouts/columns/columns.cpp
index c6481f912d..887b23f67a 100644
--- a/tilinglayouts/columns/columns.cpp
+++ b/tilinglayouts/columns/columns.cpp
@@ -149,7 +149,7 @@ void Columns::arrange( QRect wgeom )
 
     int mult = 0;
     int originalTop = wgeom.y();
-    for( QList<Tile *>::const_iterator it = ++tiled.begin() ; it != tiled.end() ; it++ )
+    for( QList<Tile *>::const_iterator it = ++tiled.constBegin() ; it != tiled.constEnd() ; it++ )
         {
         if( (*it)->floating() )
             continue;