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-rw-r--r--src/cksum.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/cksum.c b/src/cksum.c
index c991181d5..9253d9b16 100644
--- a/src/cksum.c
+++ b/src/cksum.c
@@ -309,7 +309,7 @@ main (int argc, char **argv)
atexit (close_stdout);
parse_long_options (argc, argv, PROGRAM_NAME, PACKAGE, VERSION,
- usage, AUTHORS, NULL);
+ usage, AUTHORS, (char const *) NULL);
have_read_stdin = 0;