diff --git a/src/plugins/diffeditor/diffeditorcontroller.h b/src/plugins/diffeditor/diffeditorcontroller.h
index efa89824403..b94fdc7314c 100644
--- a/src/plugins/diffeditor/diffeditorcontroller.h
+++ b/src/plugins/diffeditor/diffeditorcontroller.h
@@ -52,15 +52,14 @@ public:
     bool chunkExists(int fileIndex, int chunkIndex) const;
     Core::IDocument *document() const;
 
-    // reloadFinished() should be called inside the reloader (for synchronous reload)
-    // or later (for asynchronous reload)
-    void setReloader(const std::function<void ()> &reloader);
-
 signals:
     void chunkActionsRequested(QMenu *menu, int fileIndex, int chunkIndex,
                                const ChunkSelection &selection);
 
 protected:
+    // reloadFinished() should be called inside the reloader (for synchronous reload)
+    // or later (for asynchronous reload)
+    void setReloader(const std::function<void ()> &reloader);
     void reloadFinished(bool success);
 
     void setDiffFiles(const QList<FileData> &diffFileList,
diff --git a/src/plugins/mercurial/mercurialclient.cpp b/src/plugins/mercurial/mercurialclient.cpp
index 35e933272bd..f9da6262e29 100644
--- a/src/plugins/mercurial/mercurialclient.cpp
+++ b/src/plugins/mercurial/mercurialclient.cpp
@@ -38,12 +38,14 @@ namespace Mercurial::Internal {
 class MercurialDiffEditorController : public VcsBaseDiffEditorController
 {
 public:
-    MercurialDiffEditorController(IDocument *document)
+    MercurialDiffEditorController(IDocument *document, const QStringList &args)
         : VcsBaseDiffEditorController(document)
     {
         setDisplayName("Hg Diff");
+        setReloader([this, args] { runCommand({addConfigurationArguments(args)}); });
     }
 
+private:
     void runCommand(const QList<QStringList> &args, QTextCodec *codec = nullptr);
     QStringList addConfigurationArguments(const QStringList &args) const;
 };
@@ -416,10 +418,7 @@ void MercurialClient::requestReload(const QString &documentId, const QString &so
 
     IDocument *document = DiffEditorController::findOrCreateDocument(documentId, title);
     QTC_ASSERT(document, return);
-    auto controller = new MercurialDiffEditorController(document);
-    controller->setReloader([controller, args] {
-        controller->runCommand({controller->addConfigurationArguments(args)});
-    });
+    auto controller = new MercurialDiffEditorController(document, args);
     controller->setVcsBinary(settings().binaryPath.filePath());
     controller->setVcsTimeoutS(settings().timeout.value());
     controller->setProcessEnvironment(processEnvironment());