diff --git a/src/dolphinmodel.cpp b/src/dolphinmodel.cpp
index 47b75f1c2b..8f427adf16 100644
--- a/src/dolphinmodel.cpp
+++ b/src/dolphinmodel.cpp
@@ -83,17 +83,17 @@ QVariant DolphinModel::data(const QModelIndex &index, int role) const
                 QVariant data = theIndex.model()->data(theIndex, Qt::DisplayRole);
                 if (data.toString().size()) {
                     if (!item.isHidden() && data.toString().at(0).isLetter())
-                        retString = data.toString().toUpper().at(0);
+                        retString = data.toString().at(0).toUpper();
                     else if (item.isHidden() && data.toString().at(0) == '.' &&
                             data.toString().at(1).isLetter())
-                        retString = data.toString().toUpper().at(1);
+                        retString = data.toString().at(1).toUpper();
                     else if (item.isHidden() && data.toString().at(0) == '.' &&
                             !data.toString().at(1).isLetter())
                         retString = i18nc("@title:group Name", "Others");
                     else if (item.isHidden() && data.toString().at(0) != '.')
-                        retString = data.toString().toUpper().at(0);
+                        retString = data.toString().at(0).toUpper();
                     else if (item.isHidden())
-                        retString = data.toString().toUpper().at(0);
+                        retString = data.toString().at(0).toUpper();
                     else
                     {
                         bool validCategory = false;