diff --git a/devel/capnproto/Makefile b/devel/capnproto/Makefile
index 6748b79a7c1b..a7aa0492911e 100644
--- a/devel/capnproto/Makefile
+++ b/devel/capnproto/Makefile
@@ -1,24 +1,25 @@
 PORTNAME=	capnproto
 DISTVERSION=	1.4.0
+PORTREVISION=	1
 CATEGORIES=	devel
 MASTER_SITES=	https://capnproto.org/
 DISTNAME=	${PORTNAME}-c++-${DISTVERSION}
 
 MAINTAINER=	diizzy@FreeBSD.org
 COMMENT=	Serialization/RPC system
 WWW=		https://capnproto.org/
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
 USES=		cmake:testing compiler:c++14-lang cpe pathfix ssl
 USE_LDCONFIG=	yes
 
 CONFLICTS_INSTALL=	capnproto1
 
-PLIST_SUB=	DISTVERSION="${DISTVERSION}"
+PLIST_SUB=	DISTVERSION=${DISTVERSION}
 
 CMAKE_ON=	BUILD_SHARED_LIBS
 CMAKE_OFF=	BUILD_TESTING
 
 .include <bsd.port.mk>
diff --git a/devel/capnproto/pkg-message b/devel/capnproto/pkg-message
new file mode 100644
index 000000000000..c880aed5a20d
--- /dev/null
+++ b/devel/capnproto/pkg-message
@@ -0,0 +1,10 @@
+[
+{ type: install
+  message: <<EOM
+Due to a kernel bug this library may not work as intended on 15.0-RELEASE,
+it's expected to be fixed in 15.1-RELEASE. See following URL for more
+information:
+https://cgit.freebsd.org/src/commit/?id=476805133f5736c2c8638e41d2b5d8dd2c597f3a
+EOM
+}
+]