diff --git a/doomsday/tools/amethyst/amethyst.pro b/doomsday/tools/amethyst/amethyst.pro
index c604b67b6a..173550d988 100644
--- a/doomsday/tools/amethyst/amethyst.pro
+++ b/doomsday/tools/amethyst/amethyst.pro
@@ -22,6 +22,10 @@ CONFIG -= app_bundle
 TEMPLATE = app
 TARGET = amethyst
 
+greaterThan(QT_MAJOR_VERSION, 4) {
+    DEFINES += HAVE_QT5
+}
+
 SOURCES += \
     src/block.cpp \
     src/callstack.cpp \
diff --git a/doomsday/tools/amethyst/src/main.cpp b/doomsday/tools/amethyst/src/main.cpp
index 57557b7654..e17e35f51a 100644
--- a/doomsday/tools/amethyst/src/main.cpp
+++ b/doomsday/tools/amethyst/src/main.cpp
@@ -22,18 +22,30 @@
 #include <QDebug>
 
 #ifndef _WIN32
+# ifdef HAVE_QT5
 void messagePrinter(QtMsgType type, const QMessageLogContext &, const QString &msg)
+# else
+void messagePrinter(QtMsgType type, const char* msg)
+# endif
 {
     switch(type)
     {
     case QtDebugMsg:
     case QtWarningMsg:
     case QtCriticalMsg:
+# ifdef HAVE_QT5
         fwprintf(stderr, L"%s\n", msg.toLatin1().constData());
+# else
+        fwprintf(stderr, L"%s\n", msg);
+# endif
         break;
 
     case QtFatalMsg:
+# ifdef HAVE_QT5
         fwprintf(stderr, L"Fatal Error: %s\n", msg.toLatin1().constData());
+# else
+        fwprintf(stderr, L"Fatal Error: %s\n", msg);
+# endif
         abort();
     }
 }
@@ -69,7 +81,11 @@ void printUsage(void)
 int main(int argc, char **argv)
 {
 #ifndef _WIN32
+# ifdef HAVE_QT5
     qInstallMessageHandler(messagePrinter);
+# else
+    qInstallMsgHandler(messagePrinter);
+# endif
 #endif
     QCoreApplication a(argc, argv); // event loop never started