diff --git a/esv.1 b/esv.1
index 35257e8..d8b58c1 100644
--- a/esv.1
+++ b/esv.1
@@ -29,11 +29,11 @@ and
 .Em chapter:verse-verse .
 If the name of your desired book has a space in it, e.g.
 .Dq "1 Corinthians" ,
-you can put an underscore in the place of the space,
-or you can just pass the full book name with the space
+you can put a hyphen or underscore in the place of the space,
+or you can just pass the full book name with the space in it
 by surrounding the argument with quotes in your shell.
-Both
-.Dq 1_Corinthians
+Thus, both
+.Dq 1-Corinthians
 and
 .Dq "1 Corinthians"
 are valid book names.