diff --git a/pkg/session/common.go b/pkg/session/common.go
index 3b0b5467..7d28caa9 100644
--- a/pkg/session/common.go
+++ b/pkg/session/common.go
@@ -11,4 +11,6 @@ const (
 	KeyPersistent
 	KeyNotificationID
 	KeyReturnURL
+	// Add new fields _above_
+	SESSION_KEYS_COUNT
 )