diff --git a/indexCorpus.sh b/indexCorpus.sh
old mode 100644
new mode 100755
index 88a81f1..f1d537e
--- a/indexCorpus.sh
+++ b/indexCorpus.sh
@@ -15,7 +15,7 @@
 chunksMaxLines=4000
 
 #Help and args check
-if [ -z $2 ]
+if [ "$#" -ne 3 ]
 	then
 	echo ""
 	echo  "${BLUE}IDfr${NC} - Sisyphe Corpus indexation - 2022/03"