diff --git a/.hgignore b/.hgignore
index 4c62d7033..9e82bf6b0 100644
--- a/.hgignore
+++ b/.hgignore
@@ -38,5 +38,5 @@ Makefile$
 ^lib/util/util\.exp$
 ^lib/util/regress/.*\.(out|err)$
 
-^plugins/sudoers/(sudoers|sudoreplay|testsudoers|visudo|check_[a-z_]+)$
+^plugins/sudoers/(sudoers|sudoreplay|testsudoers|tsdump|visudo|check_[a-z_]+)$
 ^plugins/sudoers/.*\.(out|toke|err)$