diff --git a/venus-shared/types/market/assigner_type.go b/venus-shared/types/market/assigner_type.go
index d57628e4ba..dfb3f259d0 100644
--- a/venus-shared/types/market/assigner_type.go
+++ b/venus-shared/types/market/assigner_type.go
@@ -52,7 +52,7 @@ type GetDealSpec struct {
 	// if set, the deals should not be alive after or equal than the this epoch
 	EndEpoch abi.ChainEpoch
 
-	// Filter by sector lifetime
+	// Filter by sector lifetime, for snapdeal
 	SectorExpiration *abi.ChainEpoch
 }