diff --git a/trunk/fcl/CMakeLists.txt b/trunk/fcl/CMakeLists.txt
index e64d1a6d86a9eed8e02d8d1c21cbe7857f9a361f..ed92ad62440ce26cf541a1261f931b9b7f1bdf69 100644
--- a/trunk/fcl/CMakeLists.txt
+++ b/trunk/fcl/CMakeLists.txt
@@ -43,7 +43,7 @@ endif()
 if(MSVC OR MSVC90 OR MSVC10)
     add_definitions(-DBOOST_ALL_NO_LIB)
 endif()
-find_package(Boost COMPONENTS thread REQUIRED)
+find_package(Boost COMPONENTS thread system REQUIRED)
 include_directories(${Boost_INCLUDE_DIR})
 
 # make sure we know what flag we used for SSE