diff --git a/gnu/usr.bin/dialog/Makefile b/gnu/usr.bin/dialog/Makefile
index bdda638a4bd..6ab56b281c4 100644
--- a/gnu/usr.bin/dialog/Makefile
+++ b/gnu/usr.bin/dialog/Makefile
@@ -3,7 +3,7 @@
 DIALOG=	${.CURDIR}/../../../contrib/dialog
 PROG=   dialog
 
-DPADD=	$(LIBDIALOG) $(LIBNCURSES)
+DPADD=	$(LIBDIALOG) $(LIBNCURSES) $(LIBM)
 LDADD=	-ldialog -lncursesw -lm
 CFLAGS+= -I${.CURDIR} -I${DIALOG}
 .PATH:	${DIALOG}