diff --git a/.hgignore b/.hgignore
--- a/.hgignore
+++ b/.hgignore
@@ -31,4 +31,5 @@
 ^autom4te.cache/.*
 ^build-aux/.*
 ^objs.*/.*
-^test/[a-z_]*$
\ No newline at end of file
+^test/[a-z_]*$
+^demo/.*_demo$