--- configure.ac.orig	2011-09-08 23:48:16.000000000 -0700
+++ configure.ac	2011-09-08 23:48:28.000000000 -0700
@@ -137,7 +137,18 @@
 # Find libraries we will need
 #
 AC_SEARCH_LIBS(clock_gettime, rt)
-AC_SEARCH_LIBS(pthread_create, pthread)
+
+#
+# Find how to enable threads
+#
+case $host in
+*freebsd*)
+	LIBS="${LIBS} -pthread"
+	;;
+*)
+	AC_SEARCH_LIBS(pthread_create, pthread)
+	;;
+esac
 
 #
 # Prefer native kqueue(2); otherwise use libkqueue if present.