1 files changed, 1 insertions, 0 deletions
diff --git a/upb/def.h b/upb/def.h
index 98b458a..19b2a20 100644
--- a/upb/def.h
+++ b/upb/def.h
@@ -286,6 +286,7 @@ typedef enum {
 typedef enum {
   UPB_WELLKNOWN_UNSPECIFIED,
   UPB_WELLKNOWN_ANY,
+  UPB_WELLKNOWN_FIELDMASK,
   UPB_WELLKNOWN_DURATION,
   UPB_WELLKNOWN_TIMESTAMP,
   /* number wrappers */