diff --git a/src/plugins/qt4projectmanager/wizards/librarywizard.cpp b/src/plugins/qt4projectmanager/wizards/librarywizard.cpp
index a37fff3c956..606626884a6 100644
--- a/src/plugins/qt4projectmanager/wizards/librarywizard.cpp
+++ b/src/plugins/qt4projectmanager/wizards/librarywizard.cpp
@@ -99,7 +99,7 @@ Core::GeneratedFiles LibraryWizard::generateFiles(const QWizard *w,
     // Create files: global header for shared libs
     QString globalHeaderFileName;
     if (projectParams.type == QtProjectParameters::SharedLibrary) {
-        const QString globalHeaderName = buildFileName(projectPath, projectParams.fileName + QLatin1String(sharedHeaderPostfixC), headerSuffix());
+        const QString globalHeaderName = buildFileName(projectPath, projectParams.fileName.toLower() + QLatin1String(sharedHeaderPostfixC), headerSuffix());
         Core::GeneratedFile globalHeader(globalHeaderName);
         globalHeaderFileName = QFileInfo(globalHeader.path()).fileName();
         globalHeader.setContents(CppTools::AbstractEditorSupport::licenseTemplate(globalHeaderFileName)