diff --git a/scripts/base/frameworks/input/main.bro b/scripts/base/frameworks/input/main.bro
index 55da6ae7ec..758bc94732 100644
--- a/scripts/base/frameworks/input/main.bro
+++ b/scripts/base/frameworks/input/main.bro
@@ -8,6 +8,7 @@ export {
 	## The default input reader used. Defaults to `READER_ASCII`.
 	const default_reader = READER_ASCII &redef;
 
+	## The default reader mode used. Defaults to `MANUAL`.
 	const default_mode = MANUAL &redef;
 
 	## TableFilter description type used for the `table` method.