diff --git a/internal/domain/code_challenge_method.go b/internal/domain/code_challenge_method.go
index 2721b43..5d14705 100644
--- a/internal/domain/code_challenge_method.go
+++ b/internal/domain/code_challenge_method.go
@@ -36,7 +36,7 @@ var (
 
 var ErrCodeChallengeMethodUnknown error = NewError(
 	ErrorCodeInvalidRequest,
-	"unknown code_challene_method",
+	"unknown code_challenge_method",
 	"https://indieauth.net/source/#authorization-request",
 )