diff --git a/llvm-build/env_prepare.sh b/llvm-build/env_prepare.sh
index 527c69a51fd988e0e3261614b8b6c65a1d6c8f8d..9a0adb720531e0330a81e95bda4b17f738547047 100755
--- a/llvm-build/env_prepare.sh
+++ b/llvm-build/env_prepare.sh
@@ -36,7 +36,7 @@ function download_and_archive() {
     archive_dir=$1
     download_source_url=$2
     bin_file=$(basename ${download_source_url})
-    #wget -t3 -T10 -O "${bin_dir}/${bin_file}" "${download_source_url}"
+    wget -t3 -T10 -O "${bin_dir}/${bin_file}" "${download_source_url}"
     if [ ! -d "${code_dir}/${archive_dir}" ];then
         mkdir -p "${code_dir}/${archive_dir}"
     fi