diff --git a/docs/userguide/filterevents.rst b/docs/userguide/filterevents.rst
index 8477ef157..d3c4955c9 100644
--- a/docs/userguide/filterevents.rst
+++ b/docs/userguide/filterevents.rst
@@ -101,7 +101,7 @@ How filters actually work
 --------------------------
 It is useful to know how filters actually work behind the scenes in ZoneMinder, in the event you find your filter not functioning as intended:
 
-* the primary filter processing process in ZoneMinder is a perl file called ``zmfilter.pl`` 
+* the primary filter processing process in ZoneMinder is a perl file called ``zmfilter.pl`` which retrieves filters from the Filters database table
 * zmfilter.pl runs every FILTER_EXECUTE_INTERVAL seconds (default is 20s, can be changed in Options->System)
 * in each run, it goes through all the filters which are marked as "Run in Background" and if the conditions match performs the specified action
 * zmfilter.pl also reloads all the filters every FILTER_RELOAD_DELAY seconds (default is 300s/5mins, can be changed in Options->System)