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-rw-r--r--coreutils/cal.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/coreutils/cal.c b/coreutils/cal.c
index 3116e1ebe..8a08a9ae7 100644
--- a/coreutils/cal.c
+++ b/coreutils/cal.c
@@ -75,7 +75,7 @@ static char *build_row(char *p, unsigned *dp);
#define J_WEEK_LEN (WEEK_LEN + 7)
#define HEAD_SEP 2 /* spaces between day headings */
-int cal_main(int argc, char **argv);
+int cal_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int cal_main(int argc, char **argv)
{
struct tm *local_time;