diff --git a/weed/pb/volume_server.proto b/weed/pb/volume_server.proto
index f2d1f61bd..bee054cd5 100644
--- a/weed/pb/volume_server.proto
+++ b/weed/pb/volume_server.proto
@@ -99,7 +99,6 @@ message VacuumVolumeCheckResponse {
 message VacuumVolumeCompactRequest {
     uint32 volume_id = 1;
     int64 preallocate = 2;
-    bool inmemory = 3;
 }
 message VacuumVolumeCompactResponse {
 }