diff --git a/src/plugins/designer/cpp/formclasswizardpage.cpp b/src/plugins/designer/cpp/formclasswizardpage.cpp
index 4ae7e33..7d67e03 100644
--- a/src/plugins/designer/cpp/formclasswizardpage.cpp
+++ b/src/plugins/designer/cpp/formclasswizardpage.cpp
@@ -71,13 +71,13 @@ FormClassWizardPage::~FormClassWizardPage()
 }
 
 // Retrieve settings of CppTools plugin.
-static  bool inline lowerCaseFiles(const Core::ICore *core)
+bool FormClassWizardPage::lowercaseHeaderFiles()
 {
     QString lowerCaseSettingsKey = QLatin1String(CppTools::Constants::CPPTOOLS_SETTINGSGROUP);
     lowerCaseSettingsKey += QLatin1Char('/');
     lowerCaseSettingsKey += QLatin1String(CppTools::Constants::LOWERCASE_CPPFILES_KEY);
     const bool lowerCaseDefault = CppTools::Constants::lowerCaseFilesDefault;
-    return core->settings()->value(lowerCaseSettingsKey, QVariant(lowerCaseDefault)).toBool();
+    return Core::ICore::instance()->settings()->value(lowerCaseSettingsKey, QVariant(lowerCaseDefault)).toBool();
 }
 
 // Set up new class widget from settings
@@ -87,7 +87,7 @@ void FormClassWizardPage::initFileGenerationSettings()
     const Core::MimeDatabase *mdb = core->mimeDatabase();
     m_ui->newClassWidget->setHeaderExtension(mdb->preferredSuffixByType(QLatin1String(CppTools::Constants::CPP_HEADER_MIMETYPE)));
     m_ui->newClassWidget->setSourceExtension(mdb->preferredSuffixByType(QLatin1String(CppTools::Constants::CPP_SOURCE_MIMETYPE)));
-    m_ui->newClassWidget->setLowerCaseFiles(lowerCaseFiles(core));
+    m_ui->newClassWidget->setLowerCaseFiles(lowercaseHeaderFiles());
 }
 
 // Pop up settings dialog for generation settings
diff --git a/src/plugins/designer/cpp/formclasswizardpage.h b/src/plugins/designer/cpp/formclasswizardpage.h
index 610837c..8e3c0b9 100644
--- a/src/plugins/designer/cpp/formclasswizardpage.h
+++ b/src/plugins/designer/cpp/formclasswizardpage.h
@@ -63,6 +63,8 @@ public:
     FormClassWizardGenerationParameters generationParameters() const;
     void setGenerationParameters(const FormClassWizardGenerationParameters &gp);
 
+    static bool lowercaseHeaderFiles();
+
 public slots:
     void setClassName(const QString &suggestedClassName);
     void setPath(const QString &);
diff --git a/src/plugins/designer/qtcreatorintegration.cpp b/src/plugins/designer/qtcreatorintegration.cpp
index 9ebbc59..a6e48e8 100644
--- a/src/plugins/designer/qtcreatorintegration.cpp
+++ b/src/plugins/designer/qtcreatorintegration.cpp
@@ -29,6 +29,7 @@
 
 #include "formeditorplugin.h"
 #include "formwindoweditor.h"
+#include "formclasswizardpage.h"
 #include "qtcreatorintegration.h"
 #include "formeditorw.h"
 #include "editordata.h"
@@ -36,6 +37,7 @@
 #include <widgethost.h>
 
 #include <cpptools/cppmodelmanagerinterface.h>
+#include <cpptools/cpptoolsconstants.h>
 #include <cplusplus/InsertionPointLocator.h>
 #include <cplusplus/Symbols.h>
 #include <cplusplus/Overview.h>
@@ -47,6 +49,7 @@
 #include <cplusplus/Control.h>
 #include <cplusplus/TranslationUnit.h>
 #include <coreplugin/icore.h>
+#include <coreplugin/mimedatabase.h>
 #include <coreplugin/editormanager/editormanager.h>
 #include <extensionsystem/pluginmanager.h>
 #include <texteditor/basetexteditor.h>
@@ -98,6 +101,9 @@ QtCreatorIntegration::QtCreatorIntegration(QDesignerFormEditorInterface *core, F
             this, SLOT(slotNavigateToSlot(QString, QString, QStringList)));
     connect(this, SIGNAL(helpRequested(QString,QString)),
             this, SLOT(slotDesignerHelpRequested(QString,QString)));
+    slotSyncSettingsToDesigner();
+    connect(Core::ICore::instance(), SIGNAL(saveSettingsRequested()),
+            this, SLOT(slotSyncSettingsToDesigner()));
 }
 
 void QtCreatorIntegration::slotDesignerHelpRequested(const QString &manual, const QString &document)
@@ -552,3 +558,13 @@ bool QtCreatorIntegration::navigateToSlot(const QString &objectName,
 
     return true;
 }
+
+void QtCreatorIntegration::slotSyncSettingsToDesigner()
+{
+#if QT_VERSION >= 0x040800
+    // Set promotion-relevant parameters on integration.
+    const Core::MimeDatabase *mdb = Core::ICore::instance()->mimeDatabase();
+    setHeaderSuffix(mdb->preferredSuffixByType(QLatin1String(CppTools::Constants::CPP_HEADER_MIMETYPE)));
+    setHeaderLowercase(FormClassWizardPage::lowercaseHeaderFiles());
+#endif
+}
diff --git a/src/plugins/designer/qtcreatorintegration.h b/src/plugins/designer/qtcreatorintegration.h
index a246a28..7a601e1 100644
--- a/src/plugins/designer/qtcreatorintegration.h
+++ b/src/plugins/designer/qtcreatorintegration.h
@@ -59,6 +59,7 @@ public slots:
 private slots:
     void slotNavigateToSlot(const QString &objectName, const QString &signalSignature, const QStringList &parameterNames);
     void slotDesignerHelpRequested(const QString &manual, const QString &document);
+    void slotSyncSettingsToDesigner();
 
 private:
     bool navigateToSlot(const QString &objectName,
