diff --git a/graphics/openshadinglanguage/Makefile b/graphics/openshadinglanguage/Makefile
index 98ca2ef9fe6b..3bd7cbb6925a 100644
--- a/graphics/openshadinglanguage/Makefile
+++ b/graphics/openshadinglanguage/Makefile
@@ -1,7 +1,11 @@
 PORTNAME=	openshadinglanguage
 DISTVERSIONPREFIX=	v
-DISTVERSION=	1.12.12.0
-PORTREVISION=	2
+DISTVERSION=	1.12.13.0
+# PORTREVISION must be set with ?= so as not to stomp over
+# py-openimageio's PORTREVISION.
+# Also, just to be on the safe side, when resetting,
+# best keep PORTREVISION?=	0.
+PORTREVISION?=	0
 CATEGORIES?=	graphics devel
 
 MAINTAINER=	FreeBSD@Shaneware.biz
diff --git a/graphics/openshadinglanguage/distinfo b/graphics/openshadinglanguage/distinfo
index 64368ba6757f..5727b9a6cf8f 100644
--- a/graphics/openshadinglanguage/distinfo
+++ b/graphics/openshadinglanguage/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1684756315
-SHA256 (AcademySoftwareFoundation-OpenShadingLanguage-v1.12.12.0_GH0.tar.gz) = c8eea0554479608a103c6847332814e542c4eae33b2597286236c1c5688816ea
-SIZE (AcademySoftwareFoundation-OpenShadingLanguage-v1.12.12.0_GH0.tar.gz) = 20286953
+TIMESTAMP = 1690299022
+SHA256 (AcademySoftwareFoundation-OpenShadingLanguage-v1.12.13.0_GH0.tar.gz) = b5fc9f4814c1ec927773b2236d126072c1d0bbc0f031841b82649ff4d29e9d7e
+SIZE (AcademySoftwareFoundation-OpenShadingLanguage-v1.12.13.0_GH0.tar.gz) = 20286745
diff --git a/graphics/py-openshadinglanguage/Makefile b/graphics/py-openshadinglanguage/Makefile
index e70c8bb37bdc..adc0d2cfabad 100644
--- a/graphics/py-openshadinglanguage/Makefile
+++ b/graphics/py-openshadinglanguage/Makefile
@@ -1,4 +1,3 @@
-PORTREVISION=	2
 CATEGORIES=	graphics multimedia python
 # Note this port shares its PORTREVISION with graphics/openshadinglanguage!
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}