diff --git a/bisect/verify.sh b/bisect/verify.sh
index fa666300..b48740b9 100755
--- a/bisect/verify.sh
+++ b/bisect/verify.sh
@@ -1,7 +1,7 @@
 #! /usr/bin/env sh
 
 cd exercise
-if [[ "$(git log -1 --format='%s' refs/bisect/bad -- )" = '22' ]] ; then
+if [ "$(git log -1 --format='%s' refs/bisect/bad -- )" = '22' ] ; then
   echo "You managed to find the bad commit with bisect"
 else
   echo "You have still stuff to do"