diff --git a/usr.bin/calendar/Makefile b/usr.bin/calendar/Makefile
index e5d1c6a93ac..4a5999c9370 100644
--- a/usr.bin/calendar/Makefile
+++ b/usr.bin/calendar/Makefile
@@ -4,6 +4,7 @@
 PROG=	calendar
 SRCS=	calendar.c locale.c events.c dates.c parsedata.c io.c day.c \
 	ostern.c paskha.c pom.c sunpos.c
+DPADD=	${LIBM}
 LDADD=	-lm
 INTER=          de_AT.ISO_8859-15 de_DE.ISO8859-1 fr_FR.ISO8859-1 \
 		hr_HR.ISO8859-2 hu_HU.ISO8859-2 ru_RU.KOI8-R uk_UA.KOI8-U