diff --git a/src/platformsupport/fontdatabases/fontconfig/qfontconfigdatabase.cpp b/src/platformsupport/fontdatabases/fontconfig/qfontconfigdatabase.cpp
index 02b7e1bd636..5847c601a87 100644
--- a/src/platformsupport/fontdatabases/fontconfig/qfontconfigdatabase.cpp
+++ b/src/platformsupport/fontdatabases/fontconfig/qfontconfigdatabase.cpp
@@ -504,7 +504,7 @@ static void populateFromPattern(FcPattern *pattern)
 
 void QFontconfigDatabase::populateFontDatabase()
 {
-    FcInitReinitialize();
+    FcInit();
     FcFontSet  *fonts;
 
     {
@@ -568,6 +568,12 @@ void QFontconfigDatabase::populateFontDatabase()
 //    QApplication::setFont(font);
 }
 
+void QFontconfigDatabase::invalidate()
+{
+    // Clear app fonts.
+    FcConfigAppFontClear(0);
+}
+
 QFontEngineMulti *QFontconfigDatabase::fontEngineMulti(QFontEngine *fontEngine, QChar::Script script)
 {
     return new QFontEngineMultiFontConfig(fontEngine, script);
diff --git a/src/platformsupport/fontdatabases/fontconfig/qfontconfigdatabase_p.h b/src/platformsupport/fontdatabases/fontconfig/qfontconfigdatabase_p.h
index 197a442d5bb..244558b9108 100644
--- a/src/platformsupport/fontdatabases/fontconfig/qfontconfigdatabase_p.h
+++ b/src/platformsupport/fontdatabases/fontconfig/qfontconfigdatabase_p.h
@@ -62,6 +62,7 @@ class QFontconfigDatabase : public QBasicFontDatabase
 {
 public:
     void populateFontDatabase() Q_DECL_OVERRIDE;
+    void invalidate() Q_DECL_OVERRIDE;
     QFontEngineMulti *fontEngineMulti(QFontEngine *fontEngine, QChar::Script script) Q_DECL_OVERRIDE;
     QFontEngine *fontEngine(const QFontDef &fontDef, void *handle) Q_DECL_OVERRIDE;
     QFontEngine *fontEngine(const QByteArray &fontData, qreal pixelSize, QFont::HintingPreference hintingPreference) Q_DECL_OVERRIDE;