diff --git a/mail/spamass-rules/Makefile b/mail/spamass-rules/Makefile
index 37ba792dd618..3238a5083ba8 100644
--- a/mail/spamass-rules/Makefile
+++ b/mail/spamass-rules/Makefile
@@ -113,6 +113,9 @@ SPAMASS_FILES+=	weeds2.cf
 
 PLIST_FILES=	${SPAMASS_FILES:S/^/${SPAMASS_CONF}\//}
 
+do-build:
+	@${DO_NADA}
+
 pre-install:
 	@${SED} -e 's|%%LOCALBASE%%|${LOCALBASE}|g' ${.CURDIR}/pkg-message > ${PKGMESSAGE}