diff --git a/src/Character.h b/src/Character.h
index 3e94c8f75..328393b37 100644
--- a/src/Character.h
+++ b/src/Character.h
@@ -154,7 +154,7 @@ public:
     }
 
     inline static int stringWidth(const QString &str) {
-        auto ucs4Str = str.toUcs4();
+        QVector<uint> ucs4Str = str.toUcs4();
         return stringWidth(ucs4Str.constData(), ucs4Str.length());
     }
 };