--- CMakeLists.txt.orig	2015-03-08 17:25:30.122453000 -0400
+++ CMakeLists.txt	2015-03-08 17:25:37.447858000 -0400
@@ -77,7 +77,7 @@
 pkg_check_modules(IBUS REQUIRED ibus-1.0>=1.3.7)
 
 # check doxygen
-find_package(Doxygen REQUIRED)
+find_package(Doxygen)
 
 # =====
 # Define variables