--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -661,11 +661,7 @@ find_program(ETAGS etags)
 #
 # Boost
 #
-set (Boost_NO_SYSTEM_PATHS TRUE)
-if (Boost_NO_SYSTEM_PATHS)
-  set (BOOST_ROOT ${PROJECT_SOURCE_DIR}/boost)
-endif ()
-find_package (Boost 1.63 REQUIRED)
+find_package (Boost REQUIRED)
 if (Boost_FOUND)
   include_directories (${Boost_INCLUDE_DIRS})
 endif ()