diff --git a/bin/tests/system/dnssec/tests.sh b/bin/tests/system/dnssec/tests.sh
index f17413723d..6ce7abd3db 100644
--- a/bin/tests/system/dnssec/tests.sh
+++ b/bin/tests/system/dnssec/tests.sh
@@ -1402,6 +1402,7 @@ if [ $ret != 0 ]; then echo_i "failed"; fi
 status=`expr $status + $ret`
 
 get_rsasha1_key_ids_from_sigs() {
+	tr -d '\r' < signer/example.db.signed | \
 	awk '
 		NF < 8 { next }
 		$(NF-5) != "RRSIG" { next }
@@ -1411,7 +1412,8 @@ get_rsasha1_key_ids_from_sigs() {
 			getline;
 			print $3;
 		}
-	' signer/example.db.signed | sort -u
+	' | \
+	sort -u
 }
 
 echo_i "checking that a key using an unsupported algorithm cannot be generated ($n)"