diff --git a/3.5-prefsCleaner.md b/3.5-prefsCleaner.md
index a7d58e4..6ae749e 100644
--- a/3.5-prefsCleaner.md
+++ b/3.5-prefsCleaner.md
@@ -9,7 +9,7 @@
 Over time, Firefox deprecates prefs, and arkenfox also removes prefs or makes them inactive (commented out). It does this because they are no longer needed or may cause issues
 
 For the duration of each ESR life cycle
- - `0650s` - we keep a list of prefs removed by arkenfox
+ - `6050s` - we keep a list of prefs removed by arkenfox
  - `9999s` - we keep a list of prefs deprecated by firefox
 
 A master copy of everything that has ever been in the arkenfox user.js but is no longer, is kept up to date in our [cleanup script](https://github.com/arkenfox/user.js/blob/master/scratchpad-scripts/arkenfox-cleanup.js)