diff --git a/rust.spec b/rust.spec
index c2b5c6e60cc86c384a241d6bb2ec864a7c962d77..ed9ba490e60ed53aac12abc56fb6a1a9fb9de4a0 100644
--- a/rust.spec
+++ b/rust.spec
@@ -26,7 +26,7 @@
 
 Name:                rust
 Version:             1.86.0
-Release:             3
+Release:             4
 Summary:             The Rust Programming Language
 License:             Apache-2.0 OR MIT
 URL:                 https://www.rust-lang.org
@@ -140,7 +140,7 @@ BuildRequires:       %{llvm}-static libffi-devel
 %endif
 BuildRequires:       procps-ng
 BuildRequires:       ninja-build
-%ifarch x86_64 aarch64 riscv64
+%ifarch x86_64 aarch64 riscv64 loongarch64
 BuildRequires:       llvm-toolset-18-compiler-rt
 BuildRequires:       llvm-toolset-18-clang
 %else
@@ -563,6 +563,9 @@ export %{rust_env}
 %{_mandir}/man1/cargo*.1*
 
 %changelog
+* Fri May 30 2025 Wenlong Zhang <zhangwenlong@loongson.cn> - 1.86.0-4
+- add BuildRequires llvm-toolset-18-compiler-rt for loongarch64
+
 * Fri May 16 2025 Wenlong Zhang <zhangwenlong@loongson.cn> - 1.86.0-3
 - fix syntax error for rust
 - fix build error for loongarch64