diff --git a/src/plugins/mesonprojectmanager/CMakeLists.txt b/src/plugins/mesonprojectmanager/CMakeLists.txt
index 9fc1f89b6f8..da8f32ef701 100644
--- a/src/plugins/mesonprojectmanager/CMakeLists.txt
+++ b/src/plugins/mesonprojectmanager/CMakeLists.txt
@@ -33,7 +33,6 @@ add_qtc_plugin(MesonProjectManager
   mesonprojectparser.cpp
   mesonprojectparser.h
   mesonprojectplugin.cpp
-  mesonprojectplugin.h
   mesonrunconfiguration.cpp
   mesonrunconfiguration.h
   mesontoolkitaspect.cpp
diff --git a/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs b/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs
index df1c076eb60..b0c84579132 100644
--- a/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs
+++ b/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs
@@ -40,7 +40,6 @@ Project {
             "target.h",
             "mesonpluginconstants.h",
             "mesonprojectplugin.cpp",
-            "mesonprojectplugin.h",
             "arrayoptionlineedit.cpp",
             "arrayoptionlineedit.h",
             "buildoptionsmodel.cpp",
diff --git a/src/plugins/mesonprojectmanager/mesonprojectplugin.cpp b/src/plugins/mesonprojectmanager/mesonprojectplugin.cpp
index 71ef57462b2..3b3a9e6b862 100644
--- a/src/plugins/mesonprojectmanager/mesonprojectplugin.cpp
+++ b/src/plugins/mesonprojectmanager/mesonprojectplugin.cpp
@@ -1,8 +1,6 @@
 // Copyright (C) 2020 Alexis Jeandet.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
 
-#include "mesonprojectplugin.h"
-
 #include "mesonactionsmanager.h"
 #include "mesonbuildconfiguration.h"
 #include "mesonbuildsystem.h"
@@ -12,6 +10,8 @@
 #include "toolssettingsaccessor.h"
 #include "toolssettingspage.h"
 
+#include <extensionsystem/iplugin.h>
+
 #include <projectexplorer/projectexplorerconstants.h>
 #include <projectexplorer/projectmanager.h>
 #include <projectexplorer/runcontrol.h>
@@ -36,18 +36,30 @@ public:
     SimpleTargetRunnerFactory m_mesonRunWorkerFactory{{m_runConfigurationFactory.runConfigurationId()}};
 };
 
-MesonProjectPlugin::~MesonProjectPlugin()
+class MesonProjectPlugin final : public ExtensionSystem::IPlugin
 {
-    delete d;
-}
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QtCreatorPlugin" FILE "MesonProjectManager.json")
 
-void MesonProjectPlugin::initialize()
-{
-    d = new MesonProjectPluginPrivate;
+public:
+    ~MesonProjectPlugin() final
+    {
+        delete d;
+    }
 
-    ProjectManager::registerProjectType<MesonProject>(Constants::Project::MIMETYPE);
-    FileIconProvider::registerIconOverlayForFilename(Constants::Icons::MESON, "meson.build");
-    FileIconProvider::registerIconOverlayForFilename(Constants::Icons::MESON, "meson_options.txt");
-}
+private:
+    void initialize() final
+    {
+        d = new MesonProjectPluginPrivate;
+
+        ProjectManager::registerProjectType<MesonProject>(Constants::Project::MIMETYPE);
+        FileIconProvider::registerIconOverlayForFilename(Constants::Icons::MESON, "meson.build");
+        FileIconProvider::registerIconOverlayForFilename(Constants::Icons::MESON, "meson_options.txt");
+    }
+
+    class MesonProjectPluginPrivate *d = nullptr;
+};
 
 } // MesonProjectManager::Internal
+
+#include "mesonprojectplugin.moc"
diff --git a/src/plugins/mesonprojectmanager/mesonprojectplugin.h b/src/plugins/mesonprojectmanager/mesonprojectplugin.h
deleted file mode 100644
index 6cae4586dc5..00000000000
--- a/src/plugins/mesonprojectmanager/mesonprojectplugin.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright (C) 2020 Alexis Jeandet.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
-
-#pragma once
-
-#include <extensionsystem/iplugin.h>
-
-namespace MesonProjectManager {
-namespace Internal {
-
-class MesonProjectPlugin final : public ExtensionSystem::IPlugin
-{
-    Q_OBJECT
-    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QtCreatorPlugin" FILE "MesonProjectManager.json")
-
-public:
-    ~MesonProjectPlugin() final;
-
-private:
-    void initialize() final;
-
-    class MesonProjectPluginPrivate *d = nullptr;
-};
-
-} // namespace Internal
-} // namespace MesonProjectManager