diff --git a/gcc.spec b/gcc.spec
index cab523fe92ddec899e1038a07a5503aff721c802..94273a73227f73bc8c37d4fcd33a0855662319e9 100644
--- a/gcc.spec
+++ b/gcc.spec
@@ -1,7 +1,7 @@
 %define debug_package %{nil}
 
 %global gcc_version 7.3.0
-%global isl_version 0.21
+%global isl_version 0.16.1
 %global cloog_version 0.18.4
 
 %define compat_gcc_provides 7777777
@@ -41,12 +41,12 @@ Version: 7.3.0
 # number 2020033101 meaning the openEuler 20.03 release date plus 01 to
 # replace DATE and will never change it in the future.
 %global openEulerDATE 2020033101
-Release: %{openEulerDATE}.54
+Release: %{openEulerDATE}.55
 License: GPLv3+ and GPLv3+ with exceptions and GPLv2+ with exceptions and LGPLv2+ and BSD
 Group: Development/Languages
 #Source0: hcc-aarch64-linux-release.tar.bz2
 Source0: gcc-%{version}.tar.gz
-Source1: isl-%{isl_version}.tar.bz2
+Source1: isl-%{isl_version}.tar.xz
 Source2: cloog-%{cloog_version}.tar.gz
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires: gmp libmpc-devel mpfr gmp-devel glibc-headers gcc-c++ mpfr-devel
@@ -3364,6 +3364,9 @@ fi
 
 
 %changelog
+* Fri Nov 24 2023 zhaoshujian <zhaoshujian@huawei.com> - 7.3.0-2020033101.55
+- Change isl version from isl-0.21 to isl-0.16.1 to fix the deja test ice.
+
 * Tue Nov 21 2023 eastb233 <xiezhiheng@huawei.com> - 7.3.0-2020033101.54
 - Delete several patches which cause some failures.
 
diff --git a/isl-0.16.1.tar.xz b/isl-0.16.1.tar.xz
new file mode 100644
index 0000000000000000000000000000000000000000..92e76e6746b433dfd3352757ee3e9edd0f2b7270
Binary files /dev/null and b/isl-0.16.1.tar.xz differ
diff --git a/isl-0.21.tar.bz2 b/isl-0.21.tar.bz2
deleted file mode 100644
index 1b256e26d304a8a3f3b656886f5ecb4852d4a0f8..0000000000000000000000000000000000000000
Binary files a/isl-0.21.tar.bz2 and /dev/null differ