diff --git a/src/GUI/gui.cpp b/src/GUI/gui.cpp
index 9a75ad6c..07d3e482 100644
--- a/src/GUI/gui.cpp
+++ b/src/GUI/gui.cpp
@@ -160,7 +160,7 @@ void GUI::mapInitialized()
 		_showMapAction->setEnabled(true);
 		_clearMapCacheAction->setEnabled(true);
 	} else {
-		qWarning(qPrintable(map->name() + ": " + map->errorString()));
+		qWarning("%s: %s", qPrintable(map->name()), qPrintable(map->errorString()));
 		action->deleteLater();
 	}
 }
diff --git a/src/map/maplist.cpp b/src/map/maplist.cpp
index 01c027a1..391a82cf 100644
--- a/src/map/maplist.cpp
+++ b/src/map/maplist.cpp
@@ -75,7 +75,8 @@ QList<Map*> MapList::loadDir(const QString &path, QString &errorString)
 			if (map)
 				list.append(map);
 			else
-				qWarning(qPrintable(fi.absoluteFilePath() + ": " + errorString));
+				qWarning("%s: %s", qPrintable(fi.absoluteFilePath()),
+				  qPrintable(errorString));
 			if (terminate)
 				break;
 		}