diff --git a/README.md b/README.md
index 33b21cf..a33b5b0 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@ Usage of easyjson:
     	process the whole package instead of just the given file
   -snake_case
     	use snake_case names instead of CamelCase by default
-  --lower-camel-case
+  -lower_camel_case
         use lowerCamelCase instead of CamelCase by default
   -stubs
     	only generate stubs for marshaler/unmarshaler funcs