diff --git a/src/plugins/coreplugin/dialogs/ioptionspage.cpp b/src/plugins/coreplugin/dialogs/ioptionspage.cpp
index 451859c5274..f7657498ca4 100644
--- a/src/plugins/coreplugin/dialogs/ioptionspage.cpp
+++ b/src/plugins/coreplugin/dialogs/ioptionspage.cpp
@@ -240,8 +240,7 @@ static QList<IOptionsPage *> g_optionsPages;
     Constructs an options page with the given \a parent and registers it
     at the global options page pool if \a registerGlobally is \c true.
 */
-IOptionsPage::IOptionsPage(QObject *parent, bool registerGlobally)
-    : QObject(parent)
+IOptionsPage::IOptionsPage(bool registerGlobally)
 {
     if (registerGlobally)
         g_optionsPages.append(this);
diff --git a/src/plugins/coreplugin/dialogs/ioptionspage.h b/src/plugins/coreplugin/dialogs/ioptionspage.h
index 8aa2ed66413..21b5a6ec445 100644
--- a/src/plugins/coreplugin/dialogs/ioptionspage.h
+++ b/src/plugins/coreplugin/dialogs/ioptionspage.h
@@ -42,7 +42,7 @@ class CORE_EXPORT IOptionsPage : public QObject
     Q_OBJECT
 
 public:
-    IOptionsPage(QObject *parent = nullptr, bool registerGlobally = true);
+    explicit IOptionsPage(bool registerGlobally = true);
     ~IOptionsPage() override;
 
     static const QList<IOptionsPage *> allOptionsPages();
diff --git a/src/plugins/designer/settingspage.cpp b/src/plugins/designer/settingspage.cpp
index c393503d5ce..e1998ffd5e3 100644
--- a/src/plugins/designer/settingspage.cpp
+++ b/src/plugins/designer/settingspage.cpp
@@ -34,8 +34,8 @@ public:
 };
 
 
-SettingsPage::SettingsPage(QDesignerOptionsPageInterface *designerPage) :
-    Core::IOptionsPage(nullptr, false)
+SettingsPage::SettingsPage(QDesignerOptionsPageInterface *designerPage)
+    : Core::IOptionsPage(false)
 {
     setId(Utils::Id::fromString(designerPage->name()));
     setDisplayName(designerPage->name());