diff --git a/make/qt-defs.mk b/make/qt-defs.mk
index 3541b60d..c79b64cf 100644
--- a/make/qt-defs.mk
+++ b/make/qt-defs.mk
@@ -2,7 +2,7 @@ ifeq ($(USE_QT),true)
 
 USE_X                  = true
 CPPFLAGS              += -DQT_THREAD_SUPPORT  
-QT_VERSION            ?= 4.3.0
+QT_VERSION            ?= $(shell rpm -q --queryformat='%{VERSION}' --whatprovides qt)
 QT_MAJOR_VERSION      ?= $(shell echo $(QT_VERSION) | cut -d\. -f1)
 
 ifeq ($(QT_MAJOR_VERSION),2)