diff --git a/src/shared/proparser/proitems.h b/src/shared/proparser/proitems.h
index 58349ddb716..a7566be2205 100644
--- a/src/shared/proparser/proitems.h
+++ b/src/shared/proparser/proitems.h
@@ -206,9 +206,9 @@ inline QString operator+(const QString &one, const ProString &two)
     { return one + two.toQStringRef(); }
 
 inline QString operator+(const ProString &one, const char *two)
-    { return one + ProString(two); } // XXX optimize
+    { return one.toQStringRef() + QLatin1String(two); }
 inline QString operator+(const char *one, const ProString &two)
-    { return ProString(one) + two; } // XXX optimize
+    { return QLatin1String(one) + two.toQStringRef(); }
 
 inline QString &operator+=(QString &that, const ProString &other)
     { return that += other.toQStringRef(); }