diff --git a/linux/testvector-generation/checkpointSweep.sh b/linux/testvector-generation/checkpointSweep.sh
index c1543677c..075ca253c 100755
--- a/linux/testvector-generation/checkpointSweep.sh
+++ b/linux/testvector-generation/checkpointSweep.sh
@@ -1,4 +1,5 @@
-for index in {450..500}
+#!/bin/bash
+for index in {450..500};
 do 
     instrs=$(($index*1000000))
     echo "y" | nice -n 5 ./genCheckpoint.sh $instrs