diff --git a/src/gui/text/windows/qwindowsdirectwritefontdatabase.cpp b/src/gui/text/windows/qwindowsdirectwritefontdatabase.cpp
index e5e71cdaaef..610cd1d64b0 100644
--- a/src/gui/text/windows/qwindowsdirectwritefontdatabase.cpp
+++ b/src/gui/text/windows/qwindowsdirectwritefontdatabase.cpp
@@ -801,4 +801,17 @@ bool QWindowsDirectWriteFontDatabase::supportsVariableApplicationFonts() const
     return false;
 }
 
+void QWindowsDirectWriteFontDatabase::invalidate()
+{
+    QWindowsFontDatabase::invalidate();
+
+    for (IDWriteFontFamily *value : m_populatedFonts)
+        value->Release();
+    m_populatedFonts.clear();
+    m_populatedFonts.squeeze();
+
+    m_populatedBitmapFonts.clear();
+    m_populatedBitmapFonts.squeeze();
+}
+
 QT_END_NAMESPACE
diff --git a/src/gui/text/windows/qwindowsdirectwritefontdatabase_p.h b/src/gui/text/windows/qwindowsdirectwritefontdatabase_p.h
index 3b2bba4d7b6..3e5e9663a96 100644
--- a/src/gui/text/windows/qwindowsdirectwritefontdatabase_p.h
+++ b/src/gui/text/windows/qwindowsdirectwritefontdatabase_p.h
@@ -59,6 +59,9 @@ public:
         return m_populatedFonts.contains(fontFamily);
     }
 
+protected:
+    void invalidate() override;
+
 private:
     friend class QWindowsFontEngineDirectWrite;
     static QString localeString(IDWriteLocalizedStrings *names, wchar_t localeName[]);