diff --git a/mps/design/guide.impl.c.format.txt b/mps/design/guide.impl.c.format.txt
index a71f264edf2..2e4fb3a561d 100644
--- a/mps/design/guide.impl.c.format.txt
+++ b/mps/design/guide.impl.c.format.txt
@@ -7,7 +7,6 @@ C Style -- formatting
 :Author: Richard Brooksby
 :Date: 1995-08-07
 :Status: complete guide
-:Format: rst
 :Revision: $Id$
 :Copyright: See `Copyright and License`_.
 :Index terms:
diff --git a/mps/design/guide.impl.c.naming.txt b/mps/design/guide.impl.c.naming.txt
index bffc58554fc..c0645220234 100644
--- a/mps/design/guide.impl.c.naming.txt
+++ b/mps/design/guide.impl.c.naming.txt
@@ -7,7 +7,6 @@ C Style -- naming
 :Author: Gareth Rees
 :Date: 2014-10-07
 :Status: incomplete guide
-:Format: rst
 :Revision: $Id$
 :Copyright: See `Copyright and License`_.
 :Index terms: