1 files changed, 1 insertions, 1 deletions

diff --git a/regress/cipher-speed.sh b/regress/cipher-speed.sh
index 114191b89..21bf0f2e9 100644
--- a/regress/cipher-speed.sh
+++ b/regress/cipher-speed.sh
@@ -40,7 +40,7 @@ for c in $ciphers; do n=0; for m in $macs; do
         case $c in
         aes*-gcm@openssh.com)   test $n -gt 0 && break;;
         esac
-        n=$(($n + 1))
+        n=`expr $n + 1`
 done; done
 
 ciphers="3des blowfish"