diff --git a/docs/v1.x-migration.md b/docs/v1.x-migration.md
index 11a6b2c9..f2e03967 100644
--- a/docs/v1.x-migration.md
+++ b/docs/v1.x-migration.md
@@ -209,7 +209,7 @@ m.route(element, '/', {
 
 ## `m.route` mode
 
-`m.route.mode` was replaced by `m.route.prefix(prefix)` where `prefix` can be `#`, `?`, `` (for "pathname" mode). The new API also supports hashbang (`#!`), which is the default, and it supports non-root pathnames and arbitrary mode variations such as querybang (`?!`)
+`m.route.mode` was replaced by `m.route.prefix(prefix)` where `prefix` can be `#`, `?`, or an empty string (for "pathname" mode). The new API also supports hashbang (`#!`), which is the default, and it supports non-root pathnames and arbitrary mode variations such as querybang (`?!`)
 
 ## `m.route()` and anchor tags