diff --git a/src/trell_master/CMakeLists.txt b/src/trell_master/CMakeLists.txt
index c9fc7a5..3ca33fa 100644
--- a/src/trell_master/CMakeLists.txt
+++ b/src/trell_master/CMakeLists.txt
@@ -9,9 +9,10 @@ SET( TRELL_MASTER_SRC
     "RenderingDevices.cpp"
 )
 
+find_package( X11 REQUIRED )
 find_package (Threads)
 ADD_EXECUTABLE( tinia_trell_master ${TRELL_MASTER_SRC} )
-TARGET_LINK_LIBRARIES( tinia_trell_master tinia_renderlist tinia_renderlistgl tinia_trell ${RT} ${CMAKE_THREAD_LIBS_INIT} tinia_jobcontroller  ${LIBXML2_LIBRARIES} ${OPENGL_LIBRARY} tinia_model tinia_modelxml  )
+TARGET_LINK_LIBRARIES( tinia_trell_master tinia_renderlist tinia_renderlistgl tinia_trell ${RT} ${CMAKE_THREAD_LIBS_INIT} tinia_jobcontroller ${X11_LIBRARIES}  ${LIBXML2_LIBRARIES} ${OPENGL_LIBRARY} tinia_model tinia_modelxml  )
 
 
 INSTALL( TARGETS