diff --git a/net/gsk/Makefile b/net/gsk/Makefile
index 5568fe7b3c58..11bb2fab81ac 100644
--- a/net/gsk/Makefile
+++ b/net/gsk/Makefile
@@ -26,6 +26,13 @@ LDFLAGS+=	-L${OPENSSLLIB}
 
 OPTIONS_DEFINE=	DOCS
 
+.include <bsd.port.pre.mk>
+
+.if ${SSL_DEFAULT} == base
+BROKEN_FreeBSD_12=	incomplete definition of type 'struct bio_st'
+BROKEN_FreeBSD_13=	incomplete definition of type 'struct bio_st'
+.endif
+
 post-patch:
 	@${REINPLACE_CMD} -e \
 		'/^SUBDIRS/s|doc||' ${WRKSRC}/Makefile.in
@@ -40,4 +47,4 @@ post-install-DOCS-on:
 	${INSTALL_DATA} ${WRKSRC}/doc/html/*.html ${STAGEDIR}${DOCSDIR}/html
 	${INSTALL_DATA} ${WRKSRC}/doc/html/*.png ${STAGEDIR}${DOCSDIR}/html
 
-.include <bsd.port.mk>
+.include <bsd.port.post.mk>