added missing string format argument

1 files changed, 1 insertions, 1 deletions

diff --git a/sign_csr.py b/sign_csr.py
index 85622a1..662a9fb 100644
--- a/sign_csr.py
+++ b/sign_csr.py
@@ -357,7 +357,7 @@ sudo python -c "import BaseHTTPServer; \\
                 sys.stderr.write("Passed {} challenge!\n".format(i['domain']))
                 break
             else:
-                raise KeyError("'{}' challenge did not pass: {}".format(challenge_status))
+                raise KeyError("'{}' challenge did not pass: {}".format(i['domain'],challenge_status))
 
     # Step 14: Get the certificate signed
     sys.stderr.write("Requesting signature...\n")