diff --git a/src/plugins/platforms/windows/qwindowsfontdatabase.cpp b/src/plugins/platforms/windows/qwindowsfontdatabase.cpp
index 287ee4c46e..9e037723fe 100644
--- a/src/plugins/platforms/windows/qwindowsfontdatabase.cpp
+++ b/src/plugins/platforms/windows/qwindowsfontdatabase.cpp
@@ -1104,11 +1104,18 @@ QFontEngine *QWindowsFontDatabase::fontEngine(const QByteArray &fontData, qreal
         GUID guid;
         CoCreateGuid(&guid);
 
+#ifdef Q_CC_GNU
+#  pragma GCC diagnostic push
+#  pragma GCC diagnostic ignored "-Wstrict-aliasing"
+#endif
         QString uniqueFamilyName = QLatin1Char('f')
                 + QString::number(guid.Data1, 36) + QLatin1Char('-')
                 + QString::number(guid.Data2, 36) + QLatin1Char('-')
                 + QString::number(guid.Data3, 36) + QLatin1Char('-')
                 + QString::number(*reinterpret_cast<quint64 *>(guid.Data4), 36);
+#ifdef Q_CC_GNU
+#  pragma GCC diagnostic pop
+#endif
 
         QString actualFontName = font.changeFamilyName(uniqueFamilyName);
         if (actualFontName.isEmpty()) {