diff --git a/ChangeLog b/ChangeLog
index a5985176..5a17bbf0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2001-09-24  Marc Autret  <autret_m@epita.fr>
+
+	* src/files.c (compute_output_file_names): Fix.
+
 2001-09-24  Marc Autret  <autret_m@epita.fr>, Akim Demaille  <akim@epita.fr>
 
 	* src/reader.c (reader): Remove call to free_symtab ().
diff --git a/src/files.c b/src/files.c
index 03ca07a2..0051d3f4 100644
--- a/src/files.c
+++ b/src/files.c
@@ -420,7 +420,7 @@ compute_output_file_names (void)
 
   attrsfile = stringappend (short_base_name, EXT_STYPE_H);
 #ifndef MSDOS
-  stringappend (attrsfile, header_extension);
+  attrsfile = stringappend (attrsfile, header_extension);
 #endif /* MSDOS */
 
 }