diff --git a/src/plugins/designer/resourcehandler.cpp b/src/plugins/designer/resourcehandler.cpp
index c629e2d14c0..dbf8055b674 100644
--- a/src/plugins/designer/resourcehandler.cpp
+++ b/src/plugins/designer/resourcehandler.cpp
@@ -123,8 +123,7 @@ void ResourceHandler::updateResourcesHelper(bool updateProjectResources)
         qDebug() << "ResourceHandler::updateResources()" << fileName;
 
     // Filename could change in the meantime.
-    Project *project = SessionManager::projectForFile(
-                Utils::FileName::fromUserInput(QDir::fromNativeSeparators(fileName)));
+    Project *project = SessionManager::projectForFile(Utils::FileName::fromUserInput(fileName));
     const bool dirty = m_form->property("_q_resourcepathchanged").toBool();
     if (dirty)
         m_form->setDirty(true);