diff --git a/middleware/method_override.go b/middleware/method_override.go
index 25ec1f935..17335a902 100644
--- a/middleware/method_override.go
+++ b/middleware/method_override.go
@@ -19,7 +19,10 @@ type MethodOverrideConfig struct {
 	Getter MethodOverrideGetter
 }
 
-// MethodOverrideGetter is a function that gets overridden method from the request
+// MethodOverrideGetter is a function that gets overridden method from the request.
+// The returned value should be a standard HTTP method name as used by net/http
+// (e.g. http.MethodDelete, "DELETE"). The middleware does not normalize case or
+// trim spaces — callers / Getter implementations should return a valid method.
 type MethodOverrideGetter func(c *echo.Context) string
 
 // DefaultMethodOverrideConfig is the default MethodOverride middleware config.