diff --git a/ChangeLog b/ChangeLog
index 8eae12c8..3d44a0a7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2001-09-23  Pascal Bart  <pascal.bart@epita.fr>
+
+	* src/bison.simple: Add new `#line' directive.
+
 2001-09-22  Pascal Bart  <pascal.bart@epita.fr>
 
 	* src/bison.simple: New `#line' directive.
diff --git a/src/bison.simple b/src/bison.simple
index 7830a51d..5b980d18 100644
--- a/src/bison.simple
+++ b/src/bison.simple
@@ -44,8 +44,10 @@
 #define yynerrs %%prefix##nerrs
 
 /* Copy the user declarations.  */
+#line %%input_line "%%filename"
 %%prologue
 
+#line %%line "%%skeleton"
 #ifndef __cplusplus
 # ifndef __STDC__
 #  define const