diff --git a/devel/rubygem-oj/Makefile b/devel/rubygem-oj/Makefile
index 6b0c49da5948..1c77f02b5d6b 100644
--- a/devel/rubygem-oj/Makefile
+++ b/devel/rubygem-oj/Makefile
@@ -1,16 +1,22 @@
 PORTNAME=	oj
 PORTVERSION=	3.13.23
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Fast JSON parser and serializer
 WWW=		https://www.ohler.com/oj/
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		gem
 USE_RUBY=	yes
 
+# TODO: find a better way to do this
+# Copy all header file, as it is required by rubygem-oj-introspect
+post-install:
+	cd ${WRKSRC}/ext/oj && ${FIND} * -name "*.h" -type f -exec ${INSTALL_DATA} {} "${STAGEDIR}${PREFIX}/${GEMS_DIR}/${PORTNAME}-${PORTVERSION}/ext/oj/{}" \;
+
+
 .include <bsd.port.mk>
diff --git a/devel/rubygem-oj/distinfo b/devel/rubygem-oj/distinfo
index 1182e3b3475a..dde432521acf 100644
--- a/devel/rubygem-oj/distinfo
+++ b/devel/rubygem-oj/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1669058103
+TIMESTAMP = 1669998438
 SHA256 (rubygem/oj-3.13.23.gem) = 206dfdc4020ad9974705037f269cfba211d61b7662a58c717cce771829ccef51
 SIZE (rubygem/oj-3.13.23.gem) = 268288