diff --git a/src/plugins/coreplugin/plugindialog.cpp b/src/plugins/coreplugin/plugindialog.cpp
index 05d63aedc78..edca2360b33 100644
--- a/src/plugins/coreplugin/plugindialog.cpp
+++ b/src/plugins/coreplugin/plugindialog.cpp
@@ -98,7 +98,7 @@ void PluginDialog::closeDialog()
 
 void PluginDialog::showInstallWizard()
 {
-    if (PluginInstallWizard::exec())
+    if (executePluginInstallWizard())
         m_isRestartRequired = true;
 }
 
diff --git a/src/plugins/coreplugin/plugininstallwizard.cpp b/src/plugins/coreplugin/plugininstallwizard.cpp
index bc69e66913e..250ed0a31a5 100644
--- a/src/plugins/coreplugin/plugininstallwizard.cpp
+++ b/src/plugins/coreplugin/plugininstallwizard.cpp
@@ -71,7 +71,6 @@ static FilePath pluginInstallPath(bool installIntoApplication)
 }
 
 namespace Core {
-namespace Internal {
 
 class SourcePage : public WizardPage
 {
@@ -145,7 +144,7 @@ struct ArchiveIssue
 // Async. Result is set if any issue was found.
 void checkContents(QPromise<ArchiveIssue> &promise, const FilePath &tempDir)
 {
-    PluginSpec *coreplugin = PluginManager::specForPlugin(CorePlugin::instance());
+    PluginSpec *coreplugin = PluginManager::specForPlugin(Internal::CorePlugin::instance());
 
     // look for plugin
     QDirIterator it(tempDir.path(), libraryNameFilter(), QDir::Files | QDir::NoSymLinks,
@@ -397,7 +396,7 @@ static bool copyPluginFile(const FilePath &src, const FilePath &dest)
     return true;
 }
 
-bool PluginInstallWizard::exec(const FilePath &archive)
+bool executePluginInstallWizard(const FilePath &archive)
 {
     Wizard wizard(ICore::dialogParent());
     wizard.setWindowTitle(Tr::tr("Install Plugin"));
@@ -442,5 +441,4 @@ bool PluginInstallWizard::exec(const FilePath &archive)
     return false;
 }
 
-} // namespace Internal
 } // namespace Core
diff --git a/src/plugins/coreplugin/plugininstallwizard.h b/src/plugins/coreplugin/plugininstallwizard.h
index 076661b83cc..c5b1fb5d654 100644
--- a/src/plugins/coreplugin/plugininstallwizard.h
+++ b/src/plugins/coreplugin/plugininstallwizard.h
@@ -3,18 +3,14 @@
 
 #pragma once
 
+#include "core_global.h"
+
 #include <utils/filepath.h>
 
 #include <QCoreApplication>
 
 namespace Core {
-namespace Internal {
 
-class PluginInstallWizard
-{
-public:
-    static bool exec(const Utils::FilePath &archive = {});
-};
+CORE_EXPORT bool executePluginInstallWizard(const Utils::FilePath &archive = {});
 
-} // namespace Internal
 } // namespace Core