diff --git a/server/http.go b/server/http.go
index 7256f635a6cdaee2b69743c99b553c58874204bf..3bcc82841054da8f7535c0bade374bb1b9d8e640 100644
--- a/server/http.go
+++ b/server/http.go
@@ -250,6 +250,7 @@ func (h *Server) handleLogout(w http.ResponseWriter, req *http.Request, session
 
 	data := map[string]interface{}{
 		"CSRFField": csrf.TemplateField(req),
+		"URLPrefix": h.urlPrefix,
 		"Services":  svcs,
 		"IsPOST":    false,
 	}