diff --git a/rust-install.sh b/rust-install.sh
index b584b19..89c47de 100644
--- a/rust-install.sh
+++ b/rust-install.sh
@@ -4,7 +4,7 @@ set -e
 echo "Init Rust..."
 
 echo export RUSTUP_DIST_SERVER=https://mirrors.ustc.edu.cn/rust-static>>/etc/profile
-echo export export RUSTUP_UPDATE_ROOT=https://mirrors.ustc.edu.cn/rust-static/rustup>>/etc/profile
+echo export RUSTUP_UPDATE_ROOT=https://mirrors.ustc.edu.cn/rust-static/rustup>>/etc/profile
 echo export CARGO_HTTP_MULTIPLEXING=false>>/etc/profile
 
 source /etc/profile