diff --git a/scripts/block.sh b/scripts/block.sh
index d74b646..c07dcea 100755
--- a/scripts/block.sh
+++ b/scripts/block.sh
@@ -38,7 +38,11 @@ then
   echec
 fi
 
-BLOCK=`grep LAST $DATA_PATH/block_list.txt | awk '{print $2}'`
+BLOCK=$1
+if [ -z "$BLOCK" ]
+then
+        BLOCK=`grep LAST $DATA_PATH/block_list.txt | awk '{print $2}'`
+fi
 echo $BLOCK
 
 cd $APPS_PATH/info