diff --git a/benchmarks/iperf/Makefile b/benchmarks/iperf/Makefile
index d488a0a7fb9a..f15a8dc927d7 100644
--- a/benchmarks/iperf/Makefile
+++ b/benchmarks/iperf/Makefile
@@ -1,31 +1,31 @@
 # Created by: Pete Fritchman <petef@databits.net>
 
 PORTNAME=	iperf
-PORTVERSION=	2.1.4
+PORTVERSION=	2.1.6
 CATEGORIES=	benchmarks
 MASTER_SITES=	SF/iperf2 \
-		LOCAL/sunpoet/iperf/20210818
+		LOCAL/sunpoet/iperf/20211210
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Tool to measure maximum TCP and UDP bandwidth
 
 LICENSE=	BSD2CLAUSE
 
 USES=		cpe
 
 GNU_CONFIGURE=	yes
 
 CPE_VENDOR=	iperf_project
 
 OPTIONS_DEFINE=	DOCS IPV6 THREADS
 OPTIONS_DEFAULT=THREADS
 
 IPV6_CONFIGURE_ENABLE=	ipv6
 THREADS_CONFIGURE_ENABLE=	threads
 THREADS_LDFLAGS=	-lpthread
 
 post-install-DOCS-on:
 	${MKDIR} ${STAGEDIR}${DOCSDIR}/
 	cd ${WRKSRC}/ && ${INSTALL_DATA} README doc/*.gif doc/*.html ${STAGEDIR}${DOCSDIR}/
 
 .include <bsd.port.mk>
diff --git a/benchmarks/iperf/distinfo b/benchmarks/iperf/distinfo
index c0f6b15a5ca9..3d604aedcd11 100644
--- a/benchmarks/iperf/distinfo
+++ b/benchmarks/iperf/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1632036844
-SHA256 (iperf-2.1.4.tar.gz) = 062b392e87b8e227aca74fef0a99b04fe0382d4518957041b508a56885b4d4f9
-SIZE (iperf-2.1.4.tar.gz) = 395909
+TIMESTAMP = 1641045782
+SHA256 (iperf-2.1.6.tar.gz) = 4a43e44439b95622aebeee55754a17d1c94076032e90620dfc1ab9908cb9e080
+SIZE (iperf-2.1.6.tar.gz) = 401258
diff --git a/benchmarks/iperf/files/patch-compat-gettcpinfo.c b/benchmarks/iperf/files/patch-compat-gettcpinfo.c
new file mode 100644
index 000000000000..4bdfaa118032
--- /dev/null
+++ b/benchmarks/iperf/files/patch-compat-gettcpinfo.c
@@ -0,0 +1,9 @@
+--- compat/gettcpinfo.c.orig	2021-12-11 04:24:44 UTC
++++ compat/gettcpinfo.c
+@@ -97,6 +97,4 @@ inline void gettcpinfo (SOCKET sock, struct ReportStru
+     sample->tcpstats.rtt = 1;
+     sample->tcpstats.isValid  = false;
+ };
+-#else
+-inline void gettcpinfo (int sock, struct ReportStruct *sample) {
+ #endif