diff --git a/Source/QtDialog/CMakeSetup.cxx b/Source/QtDialog/CMakeSetup.cxx
index c1555a26e8..861c6e32f6 100644
--- a/Source/QtDialog/CMakeSetup.cxx
+++ b/Source/QtDialog/CMakeSetup.cxx
@@ -146,7 +146,7 @@ int main(int argc, char** argv)
   QIcon appIcon;
   appIcon.addFile(":/Icons/CMakeSetup32.png");
   appIcon.addFile(":/Icons/CMakeSetup128.png");
-  QApplication::setWindowIcon(appIcon);
+  QApplication::setWindowIcon(QIcon::fromTheme("cmake-gui", appIcon));
 
   CMakeSetupDialog dialog;
   dialog.show();