diff --git a/.hgignore b/.hgignore
index 97329aa78..7db040164 100644
--- a/.hgignore
+++ b/.hgignore
@@ -7,6 +7,7 @@
 ^testpy-output
 ^doc/html
 ^doc/latex
+^doc/ns3-object.txt
 ^\.lock-wafbuild
 ^\.waf
 ^doc/introspected-doxygen\.h$