diff --git a/bin/tests/system/checkconf/tests.sh b/bin/tests/system/checkconf/tests.sh
index 27303aefa3..ebb64fa568 100644
--- a/bin/tests/system/checkconf/tests.sh
+++ b/bin/tests/system/checkconf/tests.sh
@@ -135,6 +135,7 @@ done
 if [ $ret != 0 ]; then echo "I:failed"; fi
 status=`expr $status + $ret`
 
+n=`expr $n + 1`
 echo "I: checking options allowed in inline-signing slaves ($n)"
 ret=0
 l=`$CHECKCONF bad-dnssec.conf 2>&1 | grep "dnssec-dnskey-kskonly.*requires inline" | wc -l`