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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 5ecdb4fd3..5ae704517 100644
--- a/src/sleep.c
+++ b/src/sleep.c
@@ -36,7 +36,7 @@
proper_name ("Paul Eggert")
/* The name by which this program was run. */
-char *program_name;
+char const *program_name;
void
usage (int status)