diff --git a/make/qtplugin.mk b/make/qtplugin.mk
index fa850372..eb80a7fe 100644
--- a/make/qtplugin.mk
+++ b/make/qtplugin.mk
@@ -4,9 +4,7 @@
 # $Id$
 
 USE_QT = true
-ifndef QT_MAJOR_VERSION
-QT_MAJOR_VERSION = 4
-endif
+QT_MAJOR_VERSION ?= 4
 
 include $(MODDIR)/make/plugin.mk
 include $(MODDIR)/make/qt.mk