diff --git a/server/rsvp/response.go b/server/rsvp/response.go
index d5653db..c72536f 100644
--- a/server/rsvp/response.go
+++ b/server/rsvp/response.go
@@ -29,11 +29,13 @@ func (res *Response) Write(w http.ResponseWriter, r *http.Request) error {
 
 	if res.SeeOther != "" {
 		http.Redirect(w, r, res.SeeOther, http.StatusSeeOther)
-		flash := res.Session.FlashPeek()
-		if flash != nil {
-			err := json.NewEncoder(w).Encode(flash)
-			if err != nil {
-				return err
+		if res.Session != nil {
+			flash := res.Session.FlashPeek()
+			if flash != nil {
+				err := json.NewEncoder(w).Encode(flash)
+				if err != nil {
+					return err
+				}
 			}
 		}
 		return nil