diff --git a/docs/api-guide/versioning.md b/docs/api-guide/versioning.md
index 06b0056a..a062dc09 100644
--- a/docs/api-guide/versioning.md
+++ b/docs/api-guide/versioning.md
@@ -130,7 +130,7 @@ Your URL conf must include a pattern that matches the version with a `'version'`
 
     urlpatterns = [
         url(
-            r'^(?P<version>[v1|v2]+)/bookings/$',
+            r'^(?P<version>(v1|v2))/bookings/$',
             bookings_list,
             name='bookings-list'
         ),