diff --git a/make/qt-defs.mk b/make/qt-defs.mk
index ac348011..0b6907d1 100644
--- a/make/qt-defs.mk
+++ b/make/qt-defs.mk
@@ -1,8 +1,12 @@
 ifeq ($(USE_QT),true)
 
 USE_X                  = true
-CPPFLAGS              += -DQT_THREAD_SUPPORT  
+CPPFLAGS              += -DQT_THREAD_SUPPORT
+ifeq ($(PKG_FORMAT),rpm)
 QT_VERSION            ?= $(shell rpm -q --queryformat='%{VERSION}' --whatprovides qt)
+else
+QT_VERSION             = $(shell dpkg -s libqtcore4 | sed '^CVersion:/ !d; s/Version: *//')
+endif
 QT_MAJOR_VERSION      ?= $(shell echo $(QT_VERSION) | cut -d\. -f1)
 CPPFLAGS              += -D_QT_MAJOR_=$(QT_MAJOR_VERSION)