diff --git a/cmd/restic/global.go b/cmd/restic/global.go
index 2173a22b7..45ddd74f7 100644
--- a/cmd/restic/global.go
+++ b/cmd/restic/global.go
@@ -126,7 +126,7 @@ func init() {
 	f.Var(&globalOptions.Compression, "compression", "compression mode (only available for repository format version 2), one of (auto|off|max)")
 	f.IntVar(&globalOptions.Limits.UploadKb, "limit-upload", 0, "limits uploads to a maximum rate in KiB/s. (default: unlimited)")
 	f.IntVar(&globalOptions.Limits.DownloadKb, "limit-download", 0, "limits downloads to a maximum rate in KiB/s. (default: unlimited)")
-	f.UintVar(&globalOptions.PackSize, "pack-size", uint(targetPackSize), "set target pack size in MiB. (default: $RESTIC_PACK_SIZE)")
+	f.UintVar(&globalOptions.PackSize, "pack-size", uint(targetPackSize), "set target pack size in MiB, created pack files may be larger (default: $RESTIC_PACK_SIZE)")
 	f.StringSliceVarP(&globalOptions.Options, "option", "o", []string{}, "set extended option (`key=value`, can be specified multiple times)")
 	// Use our "generate" command instead of the cobra provided "completion" command
 	cmdRoot.CompletionOptions.DisableDefaultCmd = true