diff --git a/lib/pinchflat_web/controllers/sources/source_html/source_form.html.heex b/lib/pinchflat_web/controllers/sources/source_html/source_form.html.heex
index e94ebe6..a36e2d8 100644
--- a/lib/pinchflat_web/controllers/sources/source_html/source_form.html.heex
+++ b/lib/pinchflat_web/controllers/sources/source_html/source_form.html.heex
@@ -56,7 +56,7 @@
         type="toggle"
         label="Use Fast Indexing"
         label_suffix="(pro)"
-        help="Experimental. Overrides 'Index Frequency'. Recommended for large channels that upload frequently. See below for more info"
+        help="Experimental. Overrides 'Index Frequency'. Recommended for large channels that upload frequently. Does not work with private playlists. See below for more info"
         x-init="
           // `enabled` is the data attribute that the toggle uses internally
           fastIndexingEnabled = enabled