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;