diff --git a/Source/QtDialog/CMakeSetupDialog.cxx b/Source/QtDialog/CMakeSetupDialog.cxx
index d553cfba7..734fc1a53 100644
--- a/Source/QtDialog/CMakeSetupDialog.cxx
+++ b/Source/QtDialog/CMakeSetupDialog.cxx
@@ -393,15 +393,18 @@ void CMakeSetupDialog::doHelp()
     "directory.");
 
   QDialog dialog;
+  QFontMetrics met(this->font());
+  int msgWidth = met.width(msg);
+  dialog.setMinimumSize(msgWidth/15,20);
   dialog.setWindowTitle(tr("Help"));
   QVBoxLayout* l = new QVBoxLayout(&dialog);
   QLabel* lab = new QLabel(&dialog);
-  l->addWidget(lab);
   lab->setText(msg);
   lab->setWordWrap(true);
   QDialogButtonBox* btns = new QDialogButtonBox(QDialogButtonBox::Ok,
                                                 Qt::Horizontal, &dialog);
   QObject::connect(btns, SIGNAL(accepted()), &dialog, SLOT(accept()));
+  l->addWidget(lab);
   l->addWidget(btns);
   dialog.exec();
 }