--- udav/CMakeLists.txt	2015-11-24 12:33:30.016396488 +0600
+++ udav/CMakeLists.txt	2015-11-24 12:35:44.813724765 +0600
@@ -40,10 +40,10 @@ endif(enable-qt5)
 add_executable(udav ${udav_src} ${udav_moc_src} ${udav_rc_src})
 #set_target_properties(udav PROPERTIES COMPILE_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
 if(enable-qt5)
-	target_link_libraries(udav mgl-qt5)
+	target_link_libraries(udav mgl-qt5 X11)
 	qt5_use_modules(udav Core Widgets Gui PrintSupport)
 else(enable-qt5)
-	target_link_libraries(udav mgl-qt4)
+	target_link_libraries(udav mgl-qt4 X11)
 	target_link_libraries(udav ${QT_LIBRARIES})
 endif(enable-qt5)