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-rw-r--r--src/date.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/date.c b/src/date.c
index 8191ff638..36b282695 100644
--- a/src/date.c
+++ b/src/date.c
@@ -78,7 +78,7 @@ ARGMATCH_VERIFY (time_spec_string, time_spec);
static char const rfc_2822_format[] = "%a, %d %b %Y %H:%M:%S %z";
/* The name this program was run with, for error messages. */
-char *program_name;
+char const *program_name;
/* For long options that have no equivalent short option, use a
non-character as a pseudo short option, starting with CHAR_MAX + 1. */