diff --git a/src/cmds/restic/cmd_prune.go b/src/cmds/restic/cmd_prune.go
index 0761b3c30..7ee1117c0 100644
--- a/src/cmds/restic/cmd_prune.go
+++ b/src/cmds/restic/cmd_prune.go
@@ -126,8 +126,8 @@ func (cmd CmdPrune) Execute(args []string) error {
 		}
 	}
 
-	cmd.global.Verbosef("processed %d blobs: %d duplicate blobs, %d duplicate bytes\n",
-		stats.blobs, duplicateBlobs, duplicateBytes)
+	cmd.global.Verbosef("processed %d blobs: %d duplicate blobs, %v duplicate\n",
+		stats.blobs, duplicateBlobs, formatBytes(uint64(duplicateBytes)))
 	cmd.global.Verbosef("load all snapshots\n")
 
 	// find referenced blobs