diff --git a/contrib/create-basic-configdrive b/contrib/create-basic-configdrive
index 13b904ecc5..5d7c6448b5 100755
--- a/contrib/create-basic-configdrive
+++ b/contrib/create-basic-configdrive
@@ -43,7 +43,7 @@ ssh_authorized_keys:
   - <SSH_KEY>
 hostname: <HOSTNAME>
 "
-REGEX_SSH_FILE="^ssh-(rsa|dss|ed25519) [-A-Za-z0-9+\/]+[=]{0,2} .+"
+REGEX_SSH_FILE="^(ssh-(rsa|dss|ed25519)|ecdsa-sha2-nistp521) [-A-Za-z0-9+\/]+[=]{0,2} .+"
 
 while getopts "d:e:c:H:i:n:p:S:t:l:u:h" OPTION
 do