diff --git a/src/plugins/genericprojectmanager/filesselectionwizardpage.cpp b/src/plugins/genericprojectmanager/filesselectionwizardpage.cpp
index 8c9702bba47..c028b6a7899 100644
--- a/src/plugins/genericprojectmanager/filesselectionwizardpage.cpp
+++ b/src/plugins/genericprojectmanager/filesselectionwizardpage.cpp
@@ -55,8 +55,8 @@ FilesSelectionWizardPage::FilesSelectionWizardPage(GenericProjectWizardDialog *g
     hbox->addWidget(m_filterLabel);
     m_filterLineEdit = new QLineEdit;
 
-    const QString filter = Core::ICore::settings()->value(Constants::FILEFILTER_SETTING,
-                                                          Constants::FILEFILTER_DEFAULT).toString();
+    const QString filter = Core::ICore::settings()->value(QLatin1String(Constants::FILEFILTER_SETTING),
+                                                          QLatin1String(Constants::FILEFILTER_DEFAULT)).toString();
     m_filterLineEdit->setText(filter);
     m_filterLineEdit->hide();
     hbox->addWidget(m_filterLineEdit);
@@ -140,7 +140,7 @@ QStringList FilesSelectionWizardPage::selectedFiles() const
 void FilesSelectionWizardPage::applyFilter()
 {
     const QString filter = m_filterLineEdit->text();
-    Core::ICore::settings()->setValue(Constants::FILEFILTER_SETTING, filter);
+    Core::ICore::settings()->setValue(QLatin1String(Constants::FILEFILTER_SETTING), filter);
     m_model->applyFilter(filter);
 }
 
diff --git a/src/plugins/genericprojectmanager/genericproject.cpp b/src/plugins/genericprojectmanager/genericproject.cpp
index 16e8e8785f5..c518131f7a4 100644
--- a/src/plugins/genericprojectmanager/genericproject.cpp
+++ b/src/plugins/genericprojectmanager/genericproject.cpp
@@ -479,7 +479,7 @@ QString GenericProjectFile::suggestedFileName() const
 
 QString GenericProjectFile::mimeType() const
 {
-    return Constants::GENERICMIMETYPE;
+    return QLatin1String(Constants::GENERICMIMETYPE);
 }
 
 bool GenericProjectFile::isModified() const
diff --git a/src/plugins/genericprojectmanager/genericprojectmanager.pro b/src/plugins/genericprojectmanager/genericprojectmanager.pro
index 02c60f9540e..e40e1e7fcc7 100644
--- a/src/plugins/genericprojectmanager/genericprojectmanager.pro
+++ b/src/plugins/genericprojectmanager/genericprojectmanager.pro
@@ -2,6 +2,9 @@ TEMPLATE = lib
 TARGET = GenericProjectManager
 include(../../qtcreatorplugin.pri)
 include(genericprojectmanager_dependencies.pri)
+
+DEFINES += QT_NO_CAST_FROM_ASCII
+
 HEADERS = genericproject.h \
     genericprojectplugin.h \
     genericprojectmanager.h \
diff --git a/src/plugins/genericprojectmanager/genericprojectmanager.qbs b/src/plugins/genericprojectmanager/genericprojectmanager.qbs
index 8a47a547cbc..c574e523e41 100644
--- a/src/plugins/genericprojectmanager/genericprojectmanager.qbs
+++ b/src/plugins/genericprojectmanager/genericprojectmanager.qbs
@@ -5,6 +5,7 @@ import "../QtcPlugin.qbs" as QtcPlugin
 QtcPlugin {
     name: "GenericProjectManager"
 
+    Depends { name: "cpp" }
     Depends { name: "Qt.widgets" }
     Depends { name: "Core" }
     Depends { name: "CPlusPlus" }
@@ -14,6 +15,7 @@ QtcPlugin {
     Depends { name: "Find" }
     Depends { name: "Locator" }
     Depends { name: "QtSupport" }
+    cpp.defines: base.concat(["QT_NO_CAST_FROM_ASCII"])
 
     files: [
         "filesselectionwizardpage.cpp",
diff --git a/src/plugins/genericprojectmanager/selectablefilesmodel.cpp b/src/plugins/genericprojectmanager/selectablefilesmodel.cpp
index 14adc3d90f3..8b47de535dc 100644
--- a/src/plugins/genericprojectmanager/selectablefilesmodel.cpp
+++ b/src/plugins/genericprojectmanager/selectablefilesmodel.cpp
@@ -49,7 +49,7 @@ SelectableFilesModel::SelectableFilesModel(const QString &baseDir, QObject *pare
 {
     // Dummy tree
     m_root = new Tree;
-    m_root->name = "/";
+    m_root->name = QLatin1String("/");
     m_root->parent = 0;
     m_root->fullPath = m_baseDir;
     m_root->isDir = true;
@@ -59,7 +59,7 @@ void SelectableFilesModel::setInitialMarkedFiles(const QStringList &files)
 {
     m_files = files.toSet();
     m_outOfBaseDirFiles.clear();
-    QString base = m_baseDir + '/';
+    QString base = m_baseDir + QLatin1Char('/');
     foreach (const QString &file, m_files)
         if (!file.startsWith(base))
             m_outOfBaseDirFiles.append(file);
@@ -75,7 +75,7 @@ void SelectableFilesModel::startParsing()
 {
     // Build a tree in a future
     m_rootForFuture = new Tree;
-    m_rootForFuture->name = "/";
+    m_rootForFuture->name = QLatin1String("/");
     m_rootForFuture->parent = 0;
     m_rootForFuture->fullPath = m_baseDir;
     m_rootForFuture->isDir = true;
@@ -361,14 +361,15 @@ void SelectableFilesModel::collectFiles(Tree *root, QStringList *result) const
 QList<Glob> SelectableFilesModel::parseFilter(const QString &filter)
 {
     QList<Glob> result;
-    QStringList list = filter.split(';', QString::SkipEmptyParts);
+    QStringList list = filter.split(QLatin1Char(';'), QString::SkipEmptyParts);
     foreach (const QString &e, list) {
         QString entry = e.trimmed();
         Glob g;
-        if (entry.indexOf('*') == -1 && entry.indexOf('?') == -1) {
+        if (entry.indexOf(QLatin1Char('*')) == -1 && entry.indexOf(QLatin1Char('?')) == -1) {
             g.mode = Glob::EXACT;
             g.matchString = entry;
-        } else if (entry.startsWith('*') && entry.indexOf('*', 1) == -1 && entry.indexOf('?', 1) == -1) {
+        } else if (entry.startsWith(QLatin1Char('*')) && entry.indexOf(QLatin1Char('*'), 1) == -1
+                   && entry.indexOf(QLatin1Char('?'), 1) == -1) {
             g.mode = Glob::ENDSWITH;
             g.matchString = entry.mid(1);
         } else {
@@ -518,8 +519,8 @@ SelectableFilesDialog::SelectableFilesDialog(const QString &path, const QStringL
     hbox->addWidget(m_filterLabel);
     m_filterLineEdit = new QLineEdit(this);
 
-    const QString filter = Core::ICore::settings()->value(Constants::FILEFILTER_SETTING,
-                                                          Constants::FILEFILTER_DEFAULT).toString();
+    const QString filter = Core::ICore::settings()->value(QLatin1String(Constants::FILEFILTER_SETTING),
+                                                          QLatin1String(Constants::FILEFILTER_DEFAULT)).toString();
     m_filterLineEdit->setText(filter);
     m_filterLineEdit->hide();
     hbox->addWidget(m_filterLineEdit);
@@ -610,7 +611,7 @@ QStringList SelectableFilesDialog::selectedFiles() const
 void SelectableFilesDialog::applyFilter()
 {
     const QString filter = m_filterLineEdit->text();
-    Core::ICore::settings()->setValue(Constants::FILEFILTER_SETTING, filter);
+    Core::ICore::settings()->setValue(QLatin1String(Constants::FILEFILTER_SETTING), filter);
     m_selectableFilesModel->applyFilter(filter);
 }