diff --git a/rubook.sty b/rubook.sty
index b30b72f..108066d 100644
--- a/rubook.sty
+++ b/rubook.sty
@@ -175,7 +175,7 @@
 %\renewcommand{\encodingdefault}{t1}
 
 %\renewcommand{\rmdefault}{ptm}  % adobe times
-%\renewcommand{\sfdefault}{phv}  % adobe helvetica?
+%\renewcommand{\sfdefault}{phv}  % adobe helvetica
 %\renewcommand{\ttdefault}{pcr}  % adobe courier
 %% cmr  : computer modern roman
 %% cmss : computer modern sans oblique