diff --git a/middleware/cors.go b/middleware/cors.go
index 7fbdff26..d8b633ff 100644
--- a/middleware/cors.go
+++ b/middleware/cors.go
@@ -24,7 +24,7 @@ type (
 		AllowMethods []string `yaml:"allow_methods"`
 
 		// AllowHeaders defines a list of request headers that can be used when
-		// making the actual request. This in response to a preflight request.
+		// making the actual request. This is in response to a preflight request.
 		// Optional. Default value []string{}.
 		AllowHeaders []string `yaml:"allow_headers"`