diff -ruN /usr/ports/graphics/opennurbs/Makefile graphics/opennurbs/Makefile
--- /usr/ports/graphics/opennurbs/Makefile	2014-08-24 19:28:31.000000000 +0200
+++ graphics/opennurbs/Makefile	2015-01-27 19:56:32.000000000 +0100
@@ -31,6 +31,8 @@
 	${ICONV_CMD} -c -f utf-8 -t ascii ${WRKSRC}/opennurbs_version.h \
 		> ${WRKSRC}/opennurbs_version.h.tmp || ${TRUE}
 	${MV} ${WRKSRC}/opennurbs_version.h.tmp ${WRKSRC}/opennurbs_version.h
+	${MV} ${WRKSRC}/zlib ${WRKSRC}/zlib_
+	${CP} -R /usr/src/lib/libz ${WRKSRC}/zlib
 
 do-install:
 	@${MKDIR} ${STAGEDIR}${EXAMPLESDIR} \
@@ -71,5 +73,8 @@
 	${INSTALL_DATA} ${WRKSRC}/*.h ${STAGEDIR}${PREFIX}/include/openNURBS/
 	${INSTALL_DATA} ${WRKSRC}/zlib/*.h \
 		${STAGEDIR}${PREFIX}/include/openNURBS/zlib
+.if ${OPSYS} == FreeBSD && ${OSVERSION} < 900000
+	${TOUCH} ${STAGEDIR}${PREFIX}/include/openNURBS/zlib/gzguts.h
+.endif
 
 .include <bsd.port.post.mk>
diff -ruN /usr/ports/graphics/opennurbs/pkg-plist graphics/opennurbs/pkg-plist
--- /usr/ports/graphics/opennurbs/pkg-plist	2014-10-20 19:04:20.000000000 +0200
+++ graphics/opennurbs/pkg-plist	2015-01-27 18:43:13.000000000 +0100
@@ -104,6 +104,7 @@
 include/openNURBS/opennurbs_zlib.h
 include/openNURBS/zlib/crc32.h
 include/openNURBS/zlib/deflate.h
+include/openNURBS/zlib/gzguts.h
 include/openNURBS/zlib/inffast.h
 include/openNURBS/zlib/inffixed.h
 include/openNURBS/zlib/inflate.h
@@ -120,8 +121,6 @@
 libexec/openNURBS/example_write
 %%PORTEXAMPLES%%%%EXAMPLESDIR%%/Makefile
 %%PORTEXAMPLES%%%%EXAMPLESDIR%%/bsd.openNURBS.mk
-%%PORTEXAMPLES%%%%EXAMPLESDIR%%/examples_linking_pragmas.h
-%%PORTEXAMPLES%%%%EXAMPLESDIR%%/opennurbs.h
 %%PORTEXAMPLES%%%%EXAMPLESDIR%%/example_brep/Makefile
 %%PORTEXAMPLES%%%%EXAMPLESDIR%%/example_brep/example_brep.cc
 %%PORTEXAMPLES%%%%EXAMPLESDIR%%/example_read/Makefile
@@ -129,8 +128,10 @@
 %%PORTEXAMPLES%%%%EXAMPLESDIR%%/example_roundtrip/Makefile
 %%PORTEXAMPLES%%%%EXAMPLESDIR%%/example_roundtrip/example_roundtrip.cc
 %%PORTEXAMPLES%%%%EXAMPLESDIR%%/example_userdata/Makefile
-%%PORTEXAMPLES%%%%EXAMPLESDIR%%/example_userdata/example_userdata.cc
 %%PORTEXAMPLES%%%%EXAMPLESDIR%%/example_userdata/example_ud.cc
 %%PORTEXAMPLES%%%%EXAMPLESDIR%%/example_userdata/example_ud.h
+%%PORTEXAMPLES%%%%EXAMPLESDIR%%/example_userdata/example_userdata.cc
 %%PORTEXAMPLES%%%%EXAMPLESDIR%%/example_write/Makefile
 %%PORTEXAMPLES%%%%EXAMPLESDIR%%/example_write/example_write.cc
+%%PORTEXAMPLES%%%%EXAMPLESDIR%%/examples_linking_pragmas.h
+%%PORTEXAMPLES%%%%EXAMPLESDIR%%/opennurbs.h