diff --git a/double-conversion-3.1.5-add-sw64-support.patch b/double-conversion-3.1.5-add-sw64-support.patch
new file mode 100644
index 0000000000000000000000000000000000000000..dd2a38233df4cc1ef5869ca90465be52523d985a
--- /dev/null
+++ b/double-conversion-3.1.5-add-sw64-support.patch
@@ -0,0 +1,25 @@
+From 71242ada1f48005fc37ae3a98eda0536fa8de8f8 Mon Sep 17 00:00:00 2001
+From: mahailiang <mahailiang@uniontech.com>
+Date: Thu, 14 Nov 2024 17:03:06 +0800
+Subject: [PATCH] add sw64 support
+
+---
+ double-conversion/utils.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/double-conversion/utils.h b/double-conversion/utils.h
+index 72f1df8..0bea0d6 100644
+--- a/double-conversion/utils.h
++++ b/double-conversion/utils.h
+@@ -93,7 +93,7 @@ int main(int argc, char** argv) {
+ #if defined(_M_X64) || defined(__x86_64__) || \
+     defined(__ARMEL__) || defined(__avr32__) || defined(_M_ARM) || defined(_M_ARM64) || \
+     defined(__hppa__) || defined(__ia64__) || \
+-    defined(__loongarch64) || \
++    defined(__loongarch64) || defined(__sw_64__) || \
+     defined(__mips__) || \
+     defined(__powerpc__) || defined(__ppc__) || defined(__ppc64__) || \
+     defined(_POWER) || defined(_ARCH_PPC) || defined(_ARCH_PPC64) || \
+-- 
+2.33.0
+
diff --git a/double-conversion.spec b/double-conversion.spec
index 46dae829b8ad1ec4c78529c65cbffaf0045247b5..f73e6c08ed4833995bf2797fb7078d60b16ff264 100644
--- a/double-conversion.spec
+++ b/double-conversion.spec
@@ -1,12 +1,13 @@
 Summary:        Library providing binary-decimal and decimal-binary routines for IEEE doubles
 Name:           double-conversion
 Version:        3.1.5
-Release:        3
+Release:        4
 License:        BSD-3-Clause
 URL:            https://github.com/google/double-conversion
 Source0:        https://github.com/google/double-conversion/archive/v%{version}/%{name}-%{version}.tar.gz
 BuildRequires:  gcc gcc-c++ cmake
 Patch1:         double-conversion-3.1.5-add-loongarch-support.patch
+Patch2:         double-conversion-3.1.5-add-sw64-support.patch
 
 %description
 Provides binary-decimal and decimal-binary routines for IEEE doubles.
@@ -56,6 +57,9 @@ Static %{name} library.
 %{_includedir}/%{name}
 
 %changelog
+* Wed Mar 12 2025 mahailiang <mahailiang@uniontech.com> - 3.1.5-4
+- Add sw_64 support
+
 * Mon Nov 18 2024 Funda Wang <fundawang@yeah.net> - 3.1.5-3
 - adopt to new cmake macro
 - drop static build completely