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-rw-r--r--src/sleep.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/sleep.c b/src/sleep.c
index 5aeeb98e8..a9ff5f20d 100644
--- a/src/sleep.c
+++ b/src/sleep.c
@@ -109,7 +109,7 @@ main (int argc, char **argv)
parse_gnu_standard_options_only (argc, argv, PROGRAM_NAME, PACKAGE_NAME,
Version, true, usage, AUTHORS,
- (char const *) NULL);
+ (char const *) nullptr);
if (argc == 1)
{