diff -Nru diamond-aligner-2.1.11/debian/changelog diamond-aligner-2.1.11/debian/changelog
--- diamond-aligner-2.1.11/debian/changelog	2025-03-08 05:44:54.000000000 +0800
+++ diamond-aligner-2.1.11/debian/changelog	2025-03-08 19:10:25.000000000 +0800
@@ -1,3 +1,9 @@
+diamond-aligner (2.1.11-1.1) UNRELEASED; urgency=medium
+
+  * fix memcpy not defined on riscv64. 
+
+ -- Gui-Yue <yuemeng.gui@gmail.com>  Sat, 08 Mar 2025 19:10:25 +0800
+
 diamond-aligner (2.1.11-1) unstable; urgency=medium
 
   * New upstream version 2.1.11
diff -Nru diamond-aligner-2.1.11/debian/patches/fix_missing_cstring_riscv64.patch diamond-aligner-2.1.11/debian/patches/fix_missing_cstring_riscv64.patch
--- diamond-aligner-2.1.11/debian/patches/fix_missing_cstring_riscv64.patch	1970-01-01 08:00:00.000000000 +0800
+++ diamond-aligner-2.1.11/debian/patches/fix_missing_cstring_riscv64.patch	2025-03-08 19:10:25.000000000 +0800
@@ -0,0 +1,10 @@
+--- a/src/search/finger_print.h
++++ b/src/search/finger_print.h
+@@ -23,6 +23,7 @@
+ #pragma once
+ #include "util/simd.h"
+ #include "basic/value.h"
++#include <cstring>
+ 
+ #ifdef __AVX2__
+ 
diff -Nru diamond-aligner-2.1.11/debian/patches/series diamond-aligner-2.1.11/debian/patches/series
--- diamond-aligner-2.1.11/debian/patches/series	2025-03-08 05:44:54.000000000 +0800
+++ diamond-aligner-2.1.11/debian/patches/series	2025-03-08 19:10:03.000000000 +0800
@@ -1 +1,2 @@
 typo.patch
+fix_missing_cstring_riscv64.patch