diff --git a/textproc/py-gi-docgen/Makefile b/textproc/py-gi-docgen/Makefile
index bcec475e4cc9..649d353f7fd9 100644
--- a/textproc/py-gi-docgen/Makefile
+++ b/textproc/py-gi-docgen/Makefile
@@ -1,28 +1,33 @@
 PORTNAME=	gi-docgen
 PORTVERSION=	2021.5
+PORTREVISION=	1
 CATEGORIES=	textproc python
 MASTER_SITES=	GNOME
 PKGNAMEPREFIX=  ${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	desktop@FreeBSD.org
 COMMENT=	Documentation generator for GObject-based libraries
 
 LICENSE=	APACHE20 GPLv3
 LICENSE_COMB=	dual
 LICENSE_FILE_APACHE20=	${WRKSRC}/LICENSES/Apache-2.0.txt
 LICENSE_FILE_GPLv3=	${WRKSRC}/LICENSES/GPL-3.0-or-later.txt
 
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}Jinja2>0:devel/py-Jinja2@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}markdown>0:textproc/py-markdown@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}markupsafe>0:textproc/py-markupsafe@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pygments>0:textproc/py-pygments@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}smartypants>0:textproc/py-smartypants@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}toml>0:textproc/py-toml@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}typogrify>0:textproc/py-typogrify@${PY_FLAVOR}
 
 USES=		python:3.6+
 USE_PYTHON= 	autoplist distutils
 
 NO_ARCH=	yes
 
+post-patch:
+	${REINPLACE_CMD} -e 's|%%LOCALBASE%%|${LOCALBASE}|' \
+		${WRKSRC}/gidocgen/utils.py
+
 .include <bsd.port.mk>
diff --git a/textproc/py-gi-docgen/files/patch-gidocgen_utils.py b/textproc/py-gi-docgen/files/patch-gidocgen_utils.py
new file mode 100644
index 000000000000..1ac195999cac
--- /dev/null
+++ b/textproc/py-gi-docgen/files/patch-gidocgen_utils.py
@@ -0,0 +1,11 @@
+--- gidocgen/utils.py.orig	2021-04-15 15:10:34 UTC
++++ gidocgen/utils.py
+@@ -810,7 +810,7 @@ def find_program(bin_name, path=None):
+ 
+ def default_search_paths():
+     if not sys.platform == 'win32':
+-        xdg_data_dirs = os.environ.get("XDG_DATA_DIRS", "/usr/share:/usr/local/share").split(":")
++        xdg_data_dirs = os.environ.get("XDG_DATA_DIRS", "/usr/share:%%LOCALBASE%%/share").split(":")
+         xdg_data_home = os.environ.get("XDG_DATA_HOME", os.path.expanduser("~/.local/share"))
+     else:
+         xdg_data_dirs = None