diff --git a/doc/combine_lang_model.1.asc b/doc/combine_lang_model.1.asc
index 0c2b16d7f..cbe4b925d 100644
--- a/doc/combine_lang_model.1.asc
+++ b/doc/combine_lang_model.1.asc
@@ -16,7 +16,7 @@ combine_lang_model(1) generates a starter traineddata file that can be used to t
 
 OPTIONS
 -------
-'-l lang'::
+'--lang lang'::
 	The language to use.
 	Tesseract uses 3-character ISO 639-2 language codes. (See LANGUAGES)