Index: boost/interprocess/detail/workaround.hpp
===================================================================
--- boost/interprocess/detail/workaround.hpp	(revision 82600)
+++ boost/interprocess/detail/workaround.hpp	(working copy)
@@ -110,6 +110,7 @@
 
    #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__)
       #define BOOST_INTERPROCESS_BSD_DERIVATIVE
+      #include <sys/param.h>
       #include <sys/sysctl.h>
       #if defined(CTL_KERN) && defined (KERN_BOOTTIME)
          //#define BOOST_INTERPROCESS_HAS_KERNEL_BOOTTIME