diff --git a/net/nsd/Makefile b/net/nsd/Makefile
index 00cebd844184..5ce499da5003 100644
--- a/net/nsd/Makefile
+++ b/net/nsd/Makefile
@@ -1,6 +1,6 @@
-# $NetBSD: Makefile,v 1.126 2024/07/29 20:25:53 ryoon Exp $
+# $NetBSD: Makefile,v 1.127 2024/09/21 16:09:29 he Exp $
 
-DISTNAME=	nsd-4.10.0
+DISTNAME=	nsd-4.10.1
 CATEGORIES=	net
 MASTER_SITES=	http://www.nlnetlabs.nl/downloads/nsd/
 
diff --git a/net/nsd/distinfo b/net/nsd/distinfo
index ecdf974de1de..2bd66ff26f13 100644
--- a/net/nsd/distinfo
+++ b/net/nsd/distinfo
@@ -1,6 +1,7 @@
-$NetBSD: distinfo,v 1.85 2024/07/29 20:25:53 ryoon Exp $
+$NetBSD: distinfo,v 1.86 2024/09/21 16:09:29 he Exp $
 
-BLAKE2s (nsd-4.10.0.tar.gz) = e22ec8bb8a9262e9c217ab9d81222eb98d3062322c716a7323742754dcf2ce2c
-SHA512 (nsd-4.10.0.tar.gz) = ebf65d9a3d56ba560b587dc3cf91b0b086c9267c67f4c6a6c415cc062a08a9d0deb50cc44189b741d5b7634fe07038f6a234999f5a0ee7df6609fc026127fb09
-Size (nsd-4.10.0.tar.gz) = 1388963 bytes
+BLAKE2s (nsd-4.10.1.tar.gz) = e736a4afd563714e706fcb716c34750479c7abd5b6966370f0e807a274a4f50b
+SHA512 (nsd-4.10.1.tar.gz) = b0f4bdca8a1c6fbbe99096abc8c5f8b34ef2e66dc0da44da253ab164b35ad0aaef5d05eb682b88cc68d8b1671f7b80abafee242a784ed6deb785adee7f6a53a9
+Size (nsd-4.10.1.tar.gz) = 1404799 bytes
 SHA1 (patch-aa) = d9a423d5faa8da9a213b21fd2712225ac9645091
+SHA1 (patch-simdzone_src_generic_endian.h) = 8eef6b7d9d878101dda1507a4804241b8258a971
diff --git a/net/nsd/patches/patch-simdzone_src_generic_endian.h b/net/nsd/patches/patch-simdzone_src_generic_endian.h
new file mode 100644
index 000000000000..0b1308838016
--- /dev/null
+++ b/net/nsd/patches/patch-simdzone_src_generic_endian.h
@@ -0,0 +1,35 @@
+$NetBSD: patch-simdzone_src_generic_endian.h,v 1.1 2024/09/21 16:09:29 he Exp $
+
+WHen borrowing code from NetBSD, make it build
+*on* NetBSD, and don't cause redefinition issues...
+
+--- simdzone/src/generic/endian.h.orig	2024-09-21 15:58:37.017604378 +0000
++++ simdzone/src/generic/endian.h
+@@ -87,6 +87,11 @@
+ #elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
+ #include <sys/endian.h>
+ #endif
++#if defined(__NetBSD__)
++/* Bring bswap{16,32,64} into scope: */
++#include <sys/types.h>
++#include <machine/bswap.h>
++#endif
+ 
+ #if !defined(LITTLE_ENDIAN)
+ # if defined(__ORDER_LITTLE_ENDIAN__)
+@@ -122,6 +127,7 @@
+ # endif
+ #endif
+ 
++#if !defined(__NetBSD__)
+ static really_inline uint16_t bswap16(uint16_t x)
+ {
+   // Copied from src/common/lib/libc/gen/bswap16.c in NetBSD
+@@ -155,6 +161,7 @@ static really_inline uint64_t bswap64(ui
+          ( (x >> 40) & 0x000000000000ff00ull ) |
+          ( (x >> 56) & 0x00000000000000ffull );
+ }
++#endif /* ! __NetBSD__ */
+ 
+ # if BYTE_ORDER == LITTLE_ENDIAN
+ #   define htobe(bits, x) bswap ## bits((x))