diff --git a/usr.bin/calendar/parsedata.c b/usr.bin/calendar/parsedata.c
index 51834390d5a0..55997337514b 100644
--- a/usr.bin/calendar/parsedata.c
+++ b/usr.bin/calendar/parsedata.c
@@ -971,7 +971,7 @@ floattoday(int year, double f)
 	int *cumdays = cumdaytab[isleap(year)];
 
 	for (i = 0; 1 + cumdays[i] < f; i++)
-		;;
+		;
 	m = --i;
 	d = floor(f - 1 - cumdays[i]);
 	f -= floor(f);