diff --git a/003-Marked-unimplemented-dither-enums.patch b/003-Marked-unimplemented-dither-enums.patch
new file mode 100644
index 0000000000000000000000000000000000000000..4a839b3e6e0983c6b63a7a390ce8a3f98a8123ec
--- /dev/null
+++ b/003-Marked-unimplemented-dither-enums.patch
@@ -0,0 +1,34 @@
+From 218c4fc50b75ab2b1df5a61d8d46c372de6fb2a5 Mon Sep 17 00:00:00 2001
+From: ctl-ly <liying_1@chinatelecom.cn>
+Date: Wed, 28 Dec 2022 18:22:13 +0800
+Subject: [PATCH] 003
+
+---
+ libsndfile-1.0.31/include/sndfile.h.in | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/libsndfile-1.0.31/include/sndfile.h.in b/libsndfile-1.0.31/include/sndfile.h.in
+index 917ff4b..970fb26 100644
+--- a/libsndfile-1.0.31/include/sndfile.h.in
++++ b/libsndfile-1.0.31/include/sndfile.h.in
+@@ -173,6 +173,7 @@ enum
+ 
+ 	SFC_SET_RAW_START_OFFSET		= 0x1090,
+ 
++	/* Commands reserved for dithering, which is not implemented. */
+ 	SFC_SET_DITHER_ON_WRITE			= 0x10A0,
+ 	SFC_SET_DITHER_ON_READ			= 0x10A1,
+ 
+@@ -386,8 +387,7 @@ typedef struct
+ 
+ /*
+ ** Enums and typedefs for adding dither on read and write.
+-** See the html documentation for sf_command(), SFC_SET_DITHER_ON_WRITE
+-** and SFC_SET_DITHER_ON_READ.
++** Reserved for future implementation.
+ */
+ 
+ enum
+-- 
+2.27.0
+
diff --git a/libsndfile-1.0.31.tar.bz2 b/libsndfile-1.0.31.tar.bz2
index 683f561161d31236fc7d49aeaf1f4bd412296171..83c83bb301763b49406e64e6221cd10093636ed1 100644
Binary files a/libsndfile-1.0.31.tar.bz2 and b/libsndfile-1.0.31.tar.bz2 differ
diff --git a/libsndfile.spec b/libsndfile.spec
index 1d869da0bda16af801faa06c1fe9105b471b945a..76ba1f6cd8e0c74d8c5eed6d7d5abad930c37339 100644
--- a/libsndfile.spec
+++ b/libsndfile.spec
@@ -12,7 +12,7 @@ BuildRequires: sqlite-devel
 
 Patch1:		0001-CVE-2021-3246.patch
 Patch2:		0002-CVE-2021-4156.patch
-
+Patch3:         003-Marked-unimplemented-dither-enums.patch
 %description
 Libsndfile is a C library for reading and writing files containing
 sampled sound such as MS Windows WAV and the Apple/SGI AIFF format
@@ -116,6 +116,9 @@ LD_LIBRARY_PATH=$PWD/src/.libs make check
 %{_mandir}/man1/sndfile-salvage.1*
 
 %changelog
+* Wed Dec 28 2022 liying <liying_1@chinatelecom.cn> - 1.0.31-2
+- Marked unimplemented dither enums in the header file as such.
+
 * Mon May 16 2022 zhouwenpei <zhouwenpei1@h-partners.com> - 1.0.31-2
 - fix CVE-2021-4156