diff --git a/make/qt-defs.mk b/make/qt-defs.mk
index c79b64cf..ac348011 100644
--- a/make/qt-defs.mk
+++ b/make/qt-defs.mk
@@ -4,6 +4,7 @@ USE_X                  = true
 CPPFLAGS              += -DQT_THREAD_SUPPORT  
 QT_VERSION            ?= $(shell rpm -q --queryformat='%{VERSION}' --whatprovides qt)
 QT_MAJOR_VERSION      ?= $(shell echo $(QT_VERSION) | cut -d\. -f1)
+CPPFLAGS              += -D_QT_MAJOR_=$(QT_MAJOR_VERSION)
 
 ifeq ($(QT_MAJOR_VERSION),2)
 	QT_PREFIX             ?= /usr/lib/qt2