diff --git a/vimperator/locale/en-US/options.txt b/vimperator/locale/en-US/options.txt
index 71056576..ab3b67c0 100644
--- a/vimperator/locale/en-US/options.txt
+++ b/vimperator/locale/en-US/options.txt
@@ -247,6 +247,9 @@ This means, it you set 'defsearch' to "youtube", then [c]:open arnold
 schwarzenegger[c] will be exactly the same as [c]:open youtube arnold
 schwarzenegger[c]. Therefore, you need to add a keyword or search engine
 "youtube" first.
+
+If 'defsearch' is empty, then Firefox will always attempt to open the
+raw [[arg]].
 ____