diff --git a/0002-set-default-c++17.patch b/0002-set-default-c++17.patch
new file mode 100644
index 0000000000000000000000000000000000000000..a8ae53c553e8d668e81a6b7fb468728b2aa58b1b
--- /dev/null
+++ b/0002-set-default-c++17.patch
@@ -0,0 +1,25 @@
+From 1930e03c5d5cbf395622fda292d949ec9d1a0013 Mon Sep 17 00:00:00 2001
+From: Super User <root@localhost.localdomain>
+Date: Tue, 5 Aug 2025 12:00:16 +0000
+Subject: [PATCH] set default c++17
+
+---
+ CMakeLists.txt | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 332d24a..5eb7122 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.13)
+ set(PROJECT_NAME dde-session-ui)
+ project(${PROJECT_NAME})
+ 
+-set(CMAKE_CXX_STANDARD 14)
++set(CMAKE_CXX_STANDARD 17)
+ set(CMAKE_INCLUDE_CURRENT_DIR ON)
+ set(CMAKE_AUTOMOC ON)
+ set(CMAKE_AUTORCC ON)
+-- 
+2.50.1
+
diff --git a/dde-session-ui.spec b/dde-session-ui.spec
index 9d7826dfe227a830f1ad0a73c02667e439e2af17..2ea59e8795b95acac793cc3f9fc7664e6930741d 100644
--- a/dde-session-ui.spec
+++ b/dde-session-ui.spec
@@ -1,7 +1,7 @@
 %define __cmake_builddir $(pwd)
 Name:           dde-session-ui
 Version:        5.5.39
-Release:        2
+Release:        3
 Summary:        Deepin desktop-environment - Session UI module
 License:        GPLv3
 URL:            https://github.com/linuxdeepin/%{name}
@@ -10,6 +10,7 @@ Source1:        vendor.tar.gz
 
 Patch0:         0001-fix.patch
 #Patch1:         0001-Fix-wm-chooser-error-in-openeuler.patch
+Patch1:         0002-set-default-c++17.patch
 
 BuildRequires:  gcc-c++
 BuildRequires:  deepin-gettext-tools
@@ -93,6 +94,9 @@ sed -i "s|#greeter-session.*|greeter-session=lightdm-deepin-greeter|g" /etc/ligh
 %{_datadir}/applications/dde-*
 
 %changelog
+* Tue Aug 05 2025 pangqing <pangqing@uniontech.com> - 5.5.39-3
+- set default c++17 
+
 * Fri Feb 21 2025 pangqing <pangqing@uniontech.com> - 5.5.39-2
 - fix build error