diff --git a/src/plugins/diffeditor/diffeditorplugin.cpp b/src/plugins/diffeditor/diffeditorplugin.cpp
index a8b2b1331b9..617c19f7b7a 100644
--- a/src/plugins/diffeditor/diffeditorplugin.cpp
+++ b/src/plugins/diffeditor/diffeditorplugin.cpp
@@ -580,13 +580,12 @@ bool DiffEditorPlugin::initialize(const QStringList &arguments, QString *errorMe
     return true;
 }
 
-void DiffEditorPlugin::addFuture(const QFuture<void> &future)
+FutureSynchronizer *DiffEditorPlugin::futureSynchronizer()
 {
-    QTC_ASSERT(s_instance, return);
-    s_instance->d->m_futureSynchronizer.addFuture(future);
+    QTC_ASSERT(s_instance, return nullptr);
+    return &s_instance->d->m_futureSynchronizer;
 }
 
-
 } // namespace Internal
 } // namespace DiffEditor
 
diff --git a/src/plugins/diffeditor/diffeditorplugin.h b/src/plugins/diffeditor/diffeditorplugin.h
index 0cf10548bad..e3ec8924f47 100644
--- a/src/plugins/diffeditor/diffeditorplugin.h
+++ b/src/plugins/diffeditor/diffeditorplugin.h
@@ -8,6 +8,8 @@
 #include <coreplugin/diffservice.h>
 #include <extensionsystem/iplugin.h>
 
+namespace Utils { class FutureSynchronizer; }
+
 QT_BEGIN_NAMESPACE
 template <typename T>
 class QFuture;
@@ -39,9 +41,7 @@ public:
 
     bool initialize(const QStringList &arguments, QString *errorMessage) final;
 
-    template <typename T>
-    static void addFuture(const QFuture<T> &future) { addFuture(QFuture<void>(future)); }
-    static void addFuture(const QFuture<void> &future);
+    static Utils::FutureSynchronizer *futureSynchronizer();
 
 private:
     class DiffEditorPluginPrivate *d = nullptr;
diff --git a/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp b/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp
index 4fba7076c45..9870baccfd1 100644
--- a/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp
+++ b/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp
@@ -25,6 +25,7 @@
 #include <texteditor/textdocumentlayout.h>
 #include <texteditor/texteditorsettings.h>
 
+#include <utils/futuresynchronizer.h>
 #include <utils/runextensions.h>
 #include <utils/tooltip/tooltip.h>
 
@@ -784,7 +785,7 @@ SideBySideDiffEditorWidget::~SideBySideDiffEditorWidget()
 {
     if (m_watcher) {
         m_watcher->cancel();
-        DiffEditorPlugin::addFuture(m_watcher->future());
+        DiffEditorPlugin::futureSynchronizer()->addFuture(m_watcher->future());
     }
 }
 
@@ -816,7 +817,7 @@ void SideBySideDiffEditorWidget::clear(const QString &message)
         editor->clearAll(message);
     if (m_watcher) {
         m_watcher->cancel();
-        DiffEditorPlugin::addFuture(m_watcher->future());
+        DiffEditorPlugin::futureSynchronizer()->addFuture(m_watcher->future());
         m_watcher.reset();
         m_controller.setBusyShowing(false);
     }
diff --git a/src/plugins/diffeditor/unifieddiffeditorwidget.cpp b/src/plugins/diffeditor/unifieddiffeditorwidget.cpp
index 400e9877551..663e53166f0 100644
--- a/src/plugins/diffeditor/unifieddiffeditorwidget.cpp
+++ b/src/plugins/diffeditor/unifieddiffeditorwidget.cpp
@@ -21,6 +21,7 @@
 #include <texteditor/textdocumentlayout.h>
 #include <texteditor/texteditorsettings.h>
 
+#include <utils/futuresynchronizer.h>
 #include <utils/qtcassert.h>
 #include <utils/runextensions.h>
 #include <utils/tooltip/tooltip.h>
@@ -57,7 +58,7 @@ UnifiedDiffEditorWidget::~UnifiedDiffEditorWidget()
 {
     if (m_watcher) {
         m_watcher->cancel();
-        DiffEditorPlugin::addFuture(m_watcher->future());
+        DiffEditorPlugin::futureSynchronizer()->addFuture(m_watcher->future());
     }
 }
 
@@ -204,7 +205,7 @@ void UnifiedDiffEditorWidget::clear(const QString &message)
     setSelections({});
     if (m_watcher) {
         m_watcher->cancel();
-        DiffEditorPlugin::addFuture(m_watcher->future());
+        DiffEditorPlugin::futureSynchronizer()->addFuture(m_watcher->future());
         m_watcher.reset();
         m_controller.setBusyShowing(false);
     }