diff --git a/src/plugins/clangpchmanager/clangindexingprojectsettingswidget.cpp b/src/plugins/clangpchmanager/clangindexingprojectsettingswidget.cpp
index 25e77b58a04..fc791fe6522 100644
--- a/src/plugins/clangpchmanager/clangindexingprojectsettingswidget.cpp
+++ b/src/plugins/clangpchmanager/clangindexingprojectsettingswidget.cpp
@@ -29,15 +29,23 @@
 #include <cpptools/cppmodelmanager.h>
 #include <projectexplorer/project.h>
 
+#include "pchmanagerprojectupdater.h"
 #include "preprocessormacrocollector.h"
 #include "preprocessormacrowidget.h"
+#include "qtcreatorprojectupdater.h"
 
 namespace ClangPchManager {
-ClangIndexingProjectSettingsWidget::ClangIndexingProjectSettingsWidget(ClangIndexingProjectSettings *settings)
+ClangIndexingProjectSettingsWidget::ClangIndexingProjectSettingsWidget(
+    ClangIndexingProjectSettings *settings,
+    ProjectExplorer::Project *project,
+    QtCreatorProjectUpdater<PchManagerProjectUpdater> &projectUpdater)
     : ui(new Ui::ClangIndexingProjectSettingsWidget)
+    , m_project(project)
+    , m_projectUpdater(projectUpdater)
 {
     ui->setupUi(this);
     ui->preprocessorMacrosWidget->setSettings(settings);
+    connect(ui->reindexButton, &QPushButton::clicked, this, &ClangIndexingProjectSettingsWidget::reindex);
 }
 
 ClangIndexingProjectSettingsWidget::~ClangIndexingProjectSettingsWidget()
@@ -58,4 +66,9 @@ void ClangIndexingProjectSettingsWidget::onProjectPartsUpdated(ProjectExplorer::
     ui->preprocessorMacrosWidget->setBasePreprocessorMacros(collector.macros());
 }
 
+void ClangIndexingProjectSettingsWidget::reindex()
+{
+    m_projectUpdater.projectPartsUpdated(m_project);
+}
+
 } // namespace ClangPchManager
diff --git a/src/plugins/clangpchmanager/clangindexingprojectsettingswidget.h b/src/plugins/clangpchmanager/clangindexingprojectsettingswidget.h
index d46d8119384..2a3b4293b51 100644
--- a/src/plugins/clangpchmanager/clangindexingprojectsettingswidget.h
+++ b/src/plugins/clangpchmanager/clangindexingprojectsettingswidget.h
@@ -37,6 +37,10 @@ class ClangIndexingProjectSettingsWidget;
 
 namespace ClangPchManager {
 
+template<typename T>
+class QtCreatorProjectUpdater;
+class PchManagerProjectUpdater;
+
 class ClangIndexingProjectSettings;
 
 class ClangIndexingProjectSettingsWidget : public QWidget
@@ -44,13 +48,19 @@ class ClangIndexingProjectSettingsWidget : public QWidget
     Q_OBJECT
 
 public:
-    explicit ClangIndexingProjectSettingsWidget(ClangIndexingProjectSettings *settings);
+    explicit ClangIndexingProjectSettingsWidget(
+        ClangIndexingProjectSettings *settings,
+        ProjectExplorer::Project *project,
+        QtCreatorProjectUpdater<PchManagerProjectUpdater> &projectUpdater);
     ~ClangIndexingProjectSettingsWidget();
 
     void onProjectPartsUpdated(ProjectExplorer::Project *project);
+    void reindex();
 
 private:
     Ui::ClangIndexingProjectSettingsWidget *ui;
+    ProjectExplorer::Project *m_project;
+    QtCreatorProjectUpdater<PchManagerProjectUpdater> &m_projectUpdater;
 };
 
 } // namespace ClangPchManager
diff --git a/src/plugins/clangpchmanager/clangindexingprojectsettingswidget.ui b/src/plugins/clangpchmanager/clangindexingprojectsettingswidget.ui
index e54a2a7a91d..b10fd91beee 100644
--- a/src/plugins/clangpchmanager/clangindexingprojectsettingswidget.ui
+++ b/src/plugins/clangpchmanager/clangindexingprojectsettingswidget.ui
@@ -15,7 +15,50 @@
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
-    <widget class="ClangPchManager::PreprocessorMacroWidget" name="preprocessorMacrosWidget" native="true"/>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <property name="sizeConstraint">
+      <enum>QLayout::SetDefaultConstraint</enum>
+     </property>
+     <item>
+      <widget class="QPushButton" name="reindexButton">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="text">
+        <string>Reindex</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="horizontalSpacer">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeType">
+        <enum>QSizePolicy::Expanding</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="ClangPchManager::PreprocessorMacroWidget" name="preprocessorMacrosWidget" native="true">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+    </widget>
    </item>
   </layout>
  </widget>
diff --git a/src/plugins/clangpchmanager/clangpchmanagerplugin.cpp b/src/plugins/clangpchmanager/clangpchmanagerplugin.cpp
index 98e455b0ea8..606e12b98e8 100644
--- a/src/plugins/clangpchmanager/clangpchmanagerplugin.cpp
+++ b/src/plugins/clangpchmanager/clangpchmanagerplugin.cpp
@@ -62,13 +62,16 @@ QString backendProcessPath()
             + QStringLiteral(QTC_HOST_EXE_SUFFIX);
 }
 
-void addIndexingProjectPaneWidget(ClangIndexingSettingsManager &settingsManager)
+void addIndexingProjectPaneWidget(ClangIndexingSettingsManager &settingsManager,
+                                  QtCreatorProjectUpdater<PchManagerProjectUpdater> &projectUpdater)
 {
     auto factory = new ProjectExplorer::ProjectPanelFactory;
     factory->setPriority(120);
     factory->setDisplayName(ClangIndexingProjectSettingsWidget::tr("Clang Indexing"));
     factory->setCreateWidgetFunction([&](ProjectExplorer::Project *project) {
-        auto widget = new ClangIndexingProjectSettingsWidget(settingsManager.settings(project));
+        auto widget = new ClangIndexingProjectSettingsWidget(settingsManager.settings(project),
+                                                             project,
+                                                             projectUpdater);
 
         widget->onProjectPartsUpdated(project);
 
@@ -108,11 +111,11 @@ public:
     PchManagerClient pchManagerClient{pchCreationProgressManager, dependencyCreationProgressManager};
     PchManagerConnectionClient connectionClient{&pchManagerClient};
     ClangIndexingSettingsManager settingsManager;
-    QtCreatorProjectUpdater<PchManagerProjectUpdater> projectUpdate{connectionClient.serverProxy(),
-                                                                    pchManagerClient,
-                                                                    filePathCache,
-                                                                    projectPartsStorage,
-                                                                    settingsManager};
+    QtCreatorProjectUpdater<PchManagerProjectUpdater> projectUpdater{connectionClient.serverProxy(),
+                                                                     pchManagerClient,
+                                                                     filePathCache,
+                                                                     projectPartsStorage,
+                                                                     settingsManager};
 };
 
 std::unique_ptr<ClangPchManagerPluginData> ClangPchManagerPlugin::d;
@@ -128,7 +131,7 @@ bool ClangPchManagerPlugin::initialize(const QStringList & /*arguments*/, QStrin
 
     startBackend();
 
-    addIndexingProjectPaneWidget(d->settingsManager);
+    addIndexingProjectPaneWidget(d->settingsManager, d->projectUpdater);
 
     return true;
 }