diff --git a/UI/screenshot-obj.hpp b/UI/screenshot-obj.hpp
index 3a2603ff42bce4..037b7f84d681d1 100644
--- a/UI/screenshot-obj.hpp
+++ b/UI/screenshot-obj.hpp
@@ -15,6 +15,8 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
 
+#pragma once
+
 #include <QObject>
 #include <string>
 #include <thread>