Index: src/frontends/qt/GuiSymbols.cpp
--- src/frontends/qt/GuiSymbols.cpp.orig
+++ src/frontends/qt/GuiSymbols.cpp
@@ -250,7 +250,7 @@ class GuiSymbols::Model : public QAbstractListModel (p
 			                             "style=\"font-size: xx-large;\">%1"
 			                             "</span><br>U+%2</p>%3")
 			                     .arg(toqstr(c))
-			                     .arg(QString("%1").arg(c, 0, 16).toUpper())
+			                     .arg(QString::number(c, 16).toUpper())
 			                     .arg(latex));
 		}
 		case Qt::SizeHintRole:
