diff --git a/changes/3806-garyd203.md b/changes/3806-garyd203.md
new file mode 100644
index 0000000..25b2217
--- /dev/null
+++ b/changes/3806-garyd203.md
@@ -0,0 +1 @@
+Update documentation about lazy evaluation of sources for Settings (it's not actually done).
diff --git a/docs/usage/settings.md b/docs/usage/settings.md
index 3ab5821..6bb752a 100644
--- a/docs/usage/settings.md
+++ b/docs/usage/settings.md
@@ -278,6 +278,3 @@ You might also want to disable a source:
 {!.tmp_examples/settings_disable_source.py!}
 ```
 _(This script is complete, it should run "as is", here you might need to set the `my_api_key` environment variable)_
-
-Because of the callables approach of `customise_sources`, evaluation of sources is lazy so unused sources don't
-have an adverse effect on performance.