diff --git a/sway/config b/sway/config
index 88e3073..cd09f5b 100644
--- a/sway/config
+++ b/sway/config
@@ -88,6 +88,7 @@ exec swayidle \
 # Read `man 5 sway-input` for more information about this section.
 
 input type:touchpad {
+    # note that DWT only works for internal touchpads (see libinput issue #524)
     dwt enabled
     tap enabled
     natural_scroll enabled