diff --git a/.hgignore b/.hgignore
--- a/.hgignore
+++ b/.hgignore
@@ -270,5 +270,7 @@
 
 # Ignore support files for en-US dictionary updates
 ^extensions/spellcheck/locales/en-US/hunspell/dictionary-sources/scowl
 ^extensions/spellcheck/locales/en-US/hunspell/dictionary-sources/support_files/
 ^extensions/spellcheck/locales/en-US/hunspell/dictionary-sources/*en_US-mozilla*
+
+^somerandomnonexistentthing