diff --git a/lisp/info.el b/lisp/info.el
index 4bf83c265b0..b9216b903ec 100644
--- a/lisp/info.el
+++ b/lisp/info.el
@@ -288,7 +288,7 @@ It doesn't contain directory names or file name extensions added by Info.")
 
 (defvar Info-current-subfile nil
   "Info subfile that is actually in the *info* buffer now.
-nil if current Info file is not split into subfiles.")
+It is nil if current Info file is not split into subfiles.")
 
 (defvar Info-current-node nil
   "Name of node that Info is now looking at, or nil.")