diff --git a/beadm b/beadm
index c320342..63aee7d 100755
--- a/beadm
+++ b/beadm
@@ -29,7 +29,7 @@ unset LC_ALL
 unset LANG
 PATH=${PATH}:/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin
 
-if [ $( uname -r | cut -d '.' -f1 ) -lt 8 ]
+if [ $( uname -r | cut -d '-' -f1 | cut -d '.' -f1 ) -lt 8 ]
 then
   echo "ERROR: beadm works on FreeBSD 8.0 or later"
   exit 1