diff --git a/usr.sbin/watch/watch.c b/usr.sbin/watch/watch.c
index 6aebc999e1f7..620d796189ce 100644
--- a/usr.sbin/watch/watch.c
+++ b/usr.sbin/watch/watch.c
@@ -20,6 +20,7 @@
 #include <string.h>
 #include <termcap.h>
 #include <sgtty.h>
+#include <locale.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/time.h>
@@ -263,6 +264,8 @@ main(ac, av)
 	char            ch, *buf, chb[READB_LEN];
 	fd_set          fd_s;
 
+	(void) setlocale(LC_TIME, "");
+
 	if (getuid() != 0)
 		fatal(NULL);