diff --git a/cli/params.go b/cli/params.go
index 11a956120..533c82b5b 100644
--- a/cli/params.go
+++ b/cli/params.go
@@ -17,7 +17,7 @@ var fetchParamCmd = &cli.Command{
 		},
 	},
 	Action: func(cctx *cli.Context) error {
-		sectorSizeInt, err := units.FromHumanSize(cctx.String("proving-params"))
+		sectorSizeInt, err := units.RAMInBytes(cctx.String("proving-params"))
 		if err != nil {
 			return err
 		}
diff --git a/cmd/lotus-bench/main.go b/cmd/lotus-bench/main.go
index 4592fdbb5..e287deeff 100644
--- a/cmd/lotus-bench/main.go
+++ b/cmd/lotus-bench/main.go
@@ -129,7 +129,7 @@ func main() {
 				return err
 			}
 
-			sectorSizeInt, err := units.FromHumanSize(c.String("sector-size"))
+			sectorSizeInt, err := units.RAMInBytes(c.String("sector-size"))
 			if err != nil {
 				return err
 			}