--- autoconf/thread.orig	Mon Jul 15 21:08:21 2002
+++ autoconf/thread	Mon Jul 15 21:08:45 2002
@@ -56,6 +56,8 @@
      echo "-DGC_SOLARIS_PTHREADS -D_REENTRANT";;
    HP-UX*)
      echo "GC_HPUX_THREADS";;
+   FreeBSD*)
+     echo "-D_THREAD_SAFE -D_REENTRANT";;
    *)
      echo "";;
 esac
