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-rw-r--r--cli/flags.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/cli/flags.rs b/cli/flags.rs
index ff262b8da..bbd23148b 100644
--- a/cli/flags.rs
+++ b/cli/flags.rs
@@ -1119,6 +1119,7 @@ fn lock_arg<'a, 'b>() -> Arg<'a, 'b> {
fn lock_write_arg<'a, 'b>() -> Arg<'a, 'b> {
Arg::with_name("lock-write")
.long("lock-write")
+ .requires("lock")
.help("Write lock file. Use with --lock.")
}