Index: common/CMakeLists.txt
--- common/CMakeLists.txt.orig
+++ common/CMakeLists.txt
@@ -162,6 +162,7 @@ else()
 	)
 	target_include_directories(common PRIVATE
 		${DBUS_INCLUDE_DIRS}
+		${X11_INCLUDE_DIR}
 	)
 	target_link_libraries(common PRIVATE
 		${DBUS_LINK_LIBRARIES}
