diff --git a/backend/backend.proto b/backend/backend.proto
index 568655b6b..85e872607 100644
--- a/backend/backend.proto
+++ b/backend/backend.proto
@@ -219,6 +219,7 @@ message ModelOptions {
   int32  SwapSpace = 53;
   int32  MaxModelLen = 54;
   int32  TensorParallelSize = 55;
+  string LoadFormat = 58;
 
   string MMProj = 41;