1 files changed, 1 insertions, 1 deletions

diff --git a/util-linux/losetup.c b/util-linux/losetup.c
index e44773a07..0f5914c88 100644
--- a/util-linux/losetup.c
+++ b/util-linux/losetup.c
@@ -23,7 +23,7 @@ int losetup_main(int argc UNUSED_PARAM, char **argv)
         };
 
         /* max 2 args, all opts are mutually exclusive */
-        opt_complementary = "?2:d--of:o--df:f-do";
+        opt_complementary = "?2:d--of:o--df:f--do";
         opt = getopt32(argv, "do:f", &opt_o);
         argv += optind;