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diff --git a/src/guile/skribilo/source/c-lex.l b/src/guile/skribilo/source/c-lex.l
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+;;; c-lex.l  --  C fontifier for Skribilo.
+;;;
+;;; Copyright 2004  Erick Gallesio - I3S-CNRS/ESSI <eg@essi.fr>
+;;; Copyright 2007  Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; This program is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 2 of the License, or
+;;; (at your option) any later version.
+;;;
+;;; This program is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with this program; if not, write to the Free Software
+;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+;;; USA.
+
+space	 [ \n\9]
+letter   [_a-zA-Z]
+alphanum [_a-zA-Z0-9]
+
+%%
+
+;; Strings
+\"[^\"]*\"		(new markup
+			     (markup '&source-string)
+			     (body yytext))
+;; Comments
+;; FIXME: We shouldn't exclude `/' from comments but we do so to match the
+;; shortest multi-line comment.
+/\*(\n|[^/])*\*/	(let* ((not-line (char-set-complement (char-set #\newline)))
+                               (lines    (string-tokenize yytext not-line)))
+                          (reverse!
+                           (pair-fold (lambda (line* result)
+                                        (let* ((line  (car line*))
+                                               (last? (null? (cdr line*)))
+                                               (markup
+                                                (new markup
+                                                   (markup '&source-line-comment)
+                                                   (body   line))))
+                                          (if last?
+                                              (cons markup result)
+                                              (cons* (string #\newline)
+                                                     markup result))))
+                                      '()
+                                      lines)))
+
+//.*			(new markup
+			     (markup '&source-line-comment)
+			     (body   yytext))
+
+;; Identifiers (only letters since we are interested in keywords only)
+[_a-zA-Z]+		(let* ((ident (string->symbol yytext))
+			       (tmp   (memq ident (*the-keys*))))
+			  (if tmp
+			      (new markup
+				   (markup '&source-module)
+				   (body yytext))
+			      yytext))
+
+;; Regular text (excluding `/' and `*')
+[^\"a-zA-Z/*]+		(begin yytext)
+
+;; `/' and `*' alone.
+/[^\*]                  (begin yytext)
+\*[^/]                  (begin yytext)
+
+
+<<EOF>>			'eof
+<<ERROR>>		(skribe-error 'c-fontifier "Parse error" yytext)