diff --git a/doc/manual/source/conf.py b/doc/manual/source/conf.py
index 308bc58ba2be05fe792c1b832578c89a28b0e30a..2b4d4015a148f5bc1c8bd7e07d7125dec84deff9 100644
--- a/doc/manual/source/conf.py
+++ b/doc/manual/source/conf.py
@@ -93,5 +93,5 @@ man_pages = [
 def setup(app):
     from dynare_dom import DynareDomain
     from dynare_lex import DynareLexer
-    app.add_lexer("dynare", DynareLexer())
+    app.add_lexer("dynare",DynareLexer)
     app.add_domain(DynareDomain)