diff --git a/wagtail/contrib/redirects/models.py b/wagtail/contrib/redirects/models.py
index 436ff1f695..67f35d17dd 100644
--- a/wagtail/contrib/redirects/models.py
+++ b/wagtail/contrib/redirects/models.py
@@ -103,7 +103,7 @@ class Redirect(models.Model):
             redirect.redirect_page = redirect_to
             # Set redirect page route
             if isinstance(page_route_path, str):
-                redirect.redirect_page_route_path = Redirect.normalise_page_route(page_route_path)
+                redirect.redirect_page_route_path = Redirect.normalise_page_route_path(page_route_path)
         elif isinstance(redirect_to, str):
             # Set redirect link string
             redirect.redirect_link = redirect_to