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-rw-r--r--builtin/am.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/builtin/am.c b/builtin/am.c
index dc576a3..8f27f33 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -2113,7 +2113,9 @@ static int parse_opt_patchformat(const struct option *opt, const char *arg, int
{
int *opt_value = opt->value;
- if (!strcmp(arg, "mbox"))
+ if (unset)
+ *opt_value = PATCH_FORMAT_UNKNOWN;
+ else if (!strcmp(arg, "mbox"))
*opt_value = PATCH_FORMAT_MBOX;
else if (!strcmp(arg, "stgit"))
*opt_value = PATCH_FORMAT_STGIT;