diff --git a/secure/usr.sbin/sendmail/Makefile b/secure/usr.sbin/sendmail/Makefile
index 454a6333c36f..50228c19e25c 100644
--- a/secure/usr.sbin/sendmail/Makefile
+++ b/secure/usr.sbin/sendmail/Makefile
@@ -41,8 +41,8 @@ LIBSMUTILDIR!=	cd ${.CURDIR}/../../lib/libsmutil; make -V .OBJDIR
 .endif
 LIBSMUTIL:=	${LIBSMUTILDIR}/libsmutil.a
 
-DPADD=	${LIBSMUTIL}
-LDADD=	${LIBSMUTIL}
+DPADD+=	${LIBSMUTIL}
+LDADD+=	${LIBSMUTIL}
 
 .if !defined(NOCRYPT) && !defined(NO_OPENSSL)
 # STARTTLS support
diff --git a/usr.sbin/sendmail/Makefile b/usr.sbin/sendmail/Makefile
index 454a6333c36f..50228c19e25c 100644
--- a/usr.sbin/sendmail/Makefile
+++ b/usr.sbin/sendmail/Makefile
@@ -41,8 +41,8 @@ LIBSMUTILDIR!=	cd ${.CURDIR}/../../lib/libsmutil; make -V .OBJDIR
 .endif
 LIBSMUTIL:=	${LIBSMUTILDIR}/libsmutil.a
 
-DPADD=	${LIBSMUTIL}
-LDADD=	${LIBSMUTIL}
+DPADD+=	${LIBSMUTIL}
+LDADD+=	${LIBSMUTIL}
 
 .if !defined(NOCRYPT) && !defined(NO_OPENSSL)
 # STARTTLS support