diff --git a/addons/com.heroiclabs.nakama/utils/NakamaException.gd b/addons/com.heroiclabs.nakama/utils/NakamaException.gd
index f85ae09..f74b43e 100644
--- a/addons/com.heroiclabs.nakama/utils/NakamaException.gd
+++ b/addons/com.heroiclabs.nakama/utils/NakamaException.gd
@@ -4,6 +4,25 @@ extends RefCounted
 # Usually contains at least an error message.
 class_name NakamaException
 
+enum { GRPC_OK,
+       GRPC_CANCELED,
+       GRPC_UNKNOWN,
+       GRPC_INVALID_ARGUMENT,
+       GRPC_DEADLINE_EXCEEDED,
+       GRPC_NOT_FOUND,
+       GRPC_ALREADY_EXISTS,
+       GRPC_PERMISSION_DENIED,
+       GRPC_RESOURCE_EXHAUSTED,
+       GRPC_FAILED_PRECONDITION,
+       GRPC_ABORTED,
+       GRPC_OUT_OF_RANGE,
+       GRPC_UNIMPLEMENTED,
+       GRPC_INTERNAL,
+       GRPC_UNAVAILABLE,
+       GRPC_DATA_LOSS,
+       GRPC_UNAUTHENTICATED
+}
+
 var _status_code : int = -1
 var status_code : int:
 	set(v):