diff --git a/devel/onetbb/Makefile b/devel/onetbb/Makefile
index 5cda501074da..f98ec6f87bdd 100644
--- a/devel/onetbb/Makefile
+++ b/devel/onetbb/Makefile
@@ -1,45 +1,49 @@
 # Created by: Arun Sharma <arun@sharma-home.net>
 
 PORTNAME=	onetbb
 PORTVERSION=	2021.2.0
 DISTVERSIONPREFIX=	v
 CATEGORIES=	devel
 
 MAINTAINER=	martymac@FreeBSD.org
 COMMENT=	Library that provides thread building blocks
 
 LICENSE=	APACHE20
 
 LIB_DEPENDS=	libhwloc.so.15:devel/hwloc2
 
 USES=		cmake compiler:c++11-lang tar:tgz
 
 CMAKE_ARGS+=	-DTBB_STRICT:BOOL=FALSE \
 		-DCMAKE_INSTALL_DOCDIR:PATH="${DOCSDIR}" \
 		-DCMAKE_HWLOC_2_4_LIBRARY_PATH:PATH="${LOCALBASE}/lib/libhwloc.so" \
 		-DCMAKE_HWLOC_2_4_INCLUDE_PATH:PATH="${LOCALBASE}/include"
 
 CONFLICTS=	tbb-[0-9]*
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	oneapi-src
 GH_PROJECT=	oneTBB
 
 SUB_FILES=	onetbb.pc
 SUB_LIST=	prefix="${PREFIX}" \
 		name="${PORTNAME}" \
 		description="${COMMENT}" \
 		version="${PORTVERSION}"
 
 USE_LDCONFIG=	yes
 
 PORTDOCS=	README.md
 
 OPTIONS_DEFINE=	DOCS
 
 .include <bsd.port.pre.mk>
 
+.if ${ARCH} == powerpc
+EXTRA_PATCHES=	${FILESDIR}/extra-patch-src_tbb_tools__api_ittnotify__config.h
+.endif
+
 post-install:
 	${INSTALL_DATA} ${WRKDIR}/onetbb.pc ${STAGEDIR}${PREFIX}/libdata/pkgconfig
 
 .include <bsd.port.post.mk>
diff --git a/devel/onetbb/files/extra-patch-src_tbb_tools__api_ittnotify__config.h b/devel/onetbb/files/extra-patch-src_tbb_tools__api_ittnotify__config.h
new file mode 100644
index 000000000000..17105704d4cf
--- /dev/null
+++ b/devel/onetbb/files/extra-patch-src_tbb_tools__api_ittnotify__config.h
@@ -0,0 +1,11 @@
+--- src/tbb/tools_api/ittnotify_config.h.orig	2021-06-30 18:42:09 UTC
++++ src/tbb/tools_api/ittnotify_config.h
+@@ -335,7 +335,7 @@ ITT_INLINE long
+ __itt_interlocked_increment(volatile long* ptr) ITT_INLINE_ATTRIBUTE;
+ ITT_INLINE long __itt_interlocked_increment(volatile long* ptr)
+ {
+-    return __TBB_machine_fetchadd4(ptr, 1) + 1L;
++    return __atomic_fetch_add(ptr, 1L, __ATOMIC_SEQ_CST) + 1L;
+ }
+ #endif /* ITT_SIMPLE_INIT */
+