diff --git a/agents/unifiedmailboxagent/utils.h b/agents/unifiedmailboxagent/utils.h
index 80f8713e1..5512b2605 100644
--- a/agents/unifiedmailboxagent/utils.h
+++ b/agents/unifiedmailboxagent/utils.h
@@ -53,6 +53,7 @@ inline QSet<T> listToSet(QList<T> &&list)
     return rv;
 }
 
+#if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
 namespace std {
 template<>
 struct hash<QString> {
@@ -62,5 +63,6 @@ struct hash<QString> {
     }
 };
 }
+#endif
 
 #endif