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-rw-r--r--c_src/cmd_format.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/c_src/cmd_format.c b/c_src/cmd_format.c
index dfd54259..873c1a69 100644
--- a/c_src/cmd_format.c
+++ b/c_src/cmd_format.c
@@ -249,8 +249,10 @@ int cmd_format(int argc, char *argv[])
if (unconsumed_dev_option)
die("Options for devices apply to subsequent devices; got a device option with no device");
- if (!devices.nr)
+ if (!devices.nr) {
+ format_usage();
die("Please supply a device");
+ }
if (opts.source && !initialize)
die("--source, --no_initialize are incompatible");