diff --git a/Dashboard:-3rd-party-filters.md b/Dashboard:-3rd-party-filters.md
index a8d00b3..b123acb 100644
--- a/Dashboard:-3rd-party-filters.md
+++ b/Dashboard:-3rd-party-filters.md
@@ -8,6 +8,8 @@ The picture below shows uBlock Origin's default selection of filter lists. You c
 
 ![3rd-party filter pane](https://cloud.githubusercontent.com/assets/585534/9589096/0b6cc212-4ffa-11e5-82f1-d276b71fef91.png)
 
+uBlock Origin discards duplicate filters, so the number of filters used within a filter lists depends on how many duplicate filters were detected. The order in which the filter lists are loaded into memory is undefined.
+
 ***
 
 ##### Auto-update filter lists