diff --git a/config/CMakeChaos.txt b/config/CMakeChaos.txt
index c652b4a8e486abadd0f1da5b07cfdfc7ff14b0d0..91d5d90b5b645db8bcacf857d3891cda4324ecab 100644
--- a/config/CMakeChaos.txt
+++ b/config/CMakeChaos.txt
@@ -341,12 +341,16 @@ get_filename_component(CHAOS_C_COMPILER_REL ${CMAKE_C_COMPILER} NAME)
 ######
 
 #### TOOL VERSIONS
+if (CHAOS_BOOST_MINOR_VERSION)
+  SET(BOOST_MINOR_VERSION ${CHAOS_BOOST_MINOR_VERSION})
+ELSE()
+  SET(BOOST_MINOR_VERSION 0)
+ENDIF()
 if( CHAOS_BOOST_VERSION)
   SET(BOOST_VERSION ${CHAOS_BOOST_VERSION})
-  SET(BOOST_MINOR_VERSION ${CHAOS_BOOST_MINOR_VERSION})
+  
 ELSE()
   SET(BOOST_VERSION 66)
-  SET(BOOST_MINOR_VERSION 0)
 ENDIF()
 
 #####