diff --git a/collections.go b/collections.go
index f79cc2d..beadf19 100644
--- a/collections.go
+++ b/collections.go
@@ -242,6 +242,8 @@ func (c *Collection) DisplayCanonicalURL() string {
 	return d + p
 }
 
+// RedirectingCanonicalURL returns the fully-qualified canonical URL for the Collection, with a trailing slash. The
+// hostName field needs to be populated for this to work correctly.
 func (c *Collection) RedirectingCanonicalURL(isRedir bool) string {
 	if c.hostName == "" {
 		// If this is true, the human programmers screwed up. So ask for a bug report and fail, fail, fail
diff --git a/posts.go b/posts.go
index 4d8d019..d8754c4 100644
--- a/posts.go
+++ b/posts.go
@@ -1461,7 +1461,7 @@ func viewCollectionPost(app *App, w http.ResponseWriter, r *http.Request) error
 			if slug == "feed" {
 				// User tried to access blog feed without a trailing slash, and
 				// there's no post with a slug "feed"
-				return impart.HTTPError{http.StatusFound, c.CanonicalURL() + "/feed/"}
+				return impart.HTTPError{http.StatusFound, c.CanonicalURL() + "feed/"}
 			}
 
 			po := &Post{