diff --git a/src/httpserver/qhttpserverrequest.h b/src/httpserver/qhttpserverrequest.h
index 0e9a893..cfc8d7a 100644
--- a/src/httpserver/qhttpserverrequest.h
+++ b/src/httpserver/qhttpserverrequest.h
@@ -86,7 +86,7 @@ protected:
 
 private:
 #if !defined(QT_NO_DEBUG_STREAM)
-    friend QDebug operator<<(QDebug debug, const QHttpServerRequest &request);
+    friend Q_HTTPSERVER_EXPORT QDebug operator<<(QDebug debug, const QHttpServerRequest &request);
 #endif
 
     QHttpServerRequest();