diff --git a/include/BoostRoot.cmake b/include/BoostRoot.cmake
index e93f907..0ab5e52 100644
--- a/include/BoostRoot.cmake
+++ b/include/BoostRoot.cmake
@@ -108,8 +108,10 @@ else()
   endif()
 
   set(BUILD_TESTING OFF)
-  set(BOOST_SKIP_INSTALL_RULES ON)
-
+  if(NOT DEFINED BOOST_SKIP_INSTALL_RULES)
+    set(BOOST_SKIP_INSTALL_RULES ON)
+  endif()
+  
 endif()
 
 if(NOT CMAKE_MSVC_RUNTIME_LIBRARY)