diff --git a/core/src/lib.rs b/core/src/lib.rs
index 8a8d3a49..1f15a60b 100644
--- a/core/src/lib.rs
+++ b/core/src/lib.rs
@@ -55,6 +55,8 @@ pub enum InvalidTransactionCustomId {
 	ForbiddenAppId,
 	/// Max padded length was exceeded.
 	MaxPaddedLenExceeded,
+	/// Max recursion was reached for a call with AppId != 0.
+	MaxRecursionExceeded,
 }
 
 #[derive(