diff -r 637fb0558a73 -r fb7817a5c2b1 QTfrontend/ui/widget/themeprompt.cpp
--- a/QTfrontend/ui/widget/themeprompt.cpp	Sat Nov 21 20:22:45 2015 +0100
+++ b/QTfrontend/ui/widget/themeprompt.cpp	Sat Nov 21 21:11:13 2015 +0100
@@ -61,6 +61,7 @@
     setModal(true);
     setWindowFlags(Qt::Sheet);
     setWindowModality(Qt::WindowModal);
+    setWindowTitle(tr("Choose a theme"));
     setMinimumSize(550, 430);
     resize(550, 430);
     setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);