diff --git a/HashProgramOutput.sh b/HashProgramOutput.sh
--- a/HashProgramOutput.sh
+++ b/HashProgramOutput.sh
@@ -11,8 +11,12 @@
     md5cmd=$(which md5)
     is_md5sum=0
     if [ ! -x "$md5cmd" ]; then
-        echo "error: unable to find either 'md5sum' or 'md5'"
-        exit 1
+        md5sum=$(which csum)
+        if [ ! -x "$md5cmd" ]; then
+            echo "error: unable to find either 'md5sum', 'md5' or 'csum'"
+            exit 1
+        fi
+        md5sum="${md5cmd} -h MD5"
     fi
 fi