diff --git a/src/Gui/Splashscreen.cpp b/src/Gui/Splashscreen.cpp
index dcaaa14415..435d2c76f3 100644
--- a/src/Gui/Splashscreen.cpp
+++ b/src/Gui/Splashscreen.cpp
@@ -326,8 +326,12 @@ static QString getOperatingSystem()
             return QString::fromLatin1("Mac OS X 10.9");
         case QSysInfo::MV_10_10:
             return QString::fromLatin1("Mac OS X 10.10");
+#endif
+#if QT_VERSION >= 0x050500
         case QSysInfo::MV_10_11:
             return QString::fromLatin1("Mac OS X 10.11");
+#endif
+#if QT_VERSION >= 0x050600
         case QSysInfo::MV_10_12:
             return QString::fromLatin1("Mac OS X 10.12");
 #endif