diff --git a/src/main/java/com/google/genai/types/FileSource.java b/src/main/java/com/google/genai/types/FileSource.java
index 1763c1c4d78..06e9ce1436a 100644
--- a/src/main/java/com/google/genai/types/FileSource.java
+++ b/src/main/java/com/google/genai/types/FileSource.java
@@ -34,6 +34,8 @@ public enum Known {
 
     GENERATED,
 
+    REGISTERED,
+
     FILE_SOURCE_UNSPECIFIED
   }