diff --git a/check_rc_upgrade.sh b/check_rc_upgrade.sh
index 3df1029..8cf41c4 100755
--- a/check_rc_upgrade.sh
+++ b/check_rc_upgrade.sh
@@ -65,6 +65,7 @@ done
 
 current=`egrep "define.*RCMAIL_VERSION" $RC_HOME/program/include/iniset.php|sed "s/define('.*', '\([^']*\)'.*$/\1/"`
 current="`echo $current|sed 's/-rc$//'`"
+current="`echo $current|sed 's/-beta$//'`"
 [ $DEBUG -eq 1 ] && echo "Current : $current"
 
 for i in `seq 1 $MAX_CHECK`