diff --git a/install_nginx.sh b/install_nginx.sh
index d64a066..c953743 100644
--- a/install_nginx.sh
+++ b/install_nginx.sh
@@ -9,7 +9,11 @@ cpu_cores="$(nproc --all)"
 openssl_ver="$(openssl version|xargs| awk '{print $2}')"
 openssl_dir=""
 openssl_source_dir=""
-if [[ "$openssl_ver" < "1.1.1" ]]; then
+force_reinstall_openssl="0"
+if [[ ! -d "/usr/include/openssl" ]] && [[ ! -d "/usr/local/include/openssl" ]] && [[ ! -d "/usr/pkg/include/openssl" ]] && [[ ! -d "/opt/local/include/openssl" ]]; then
+    force_reinstall_openssl="1"
+fi
+if [[ "$openssl_ver" < "1.1.1" ]] || [[ "$force_reinstall_openssl" == "1" ]]; then
     # Build openssl
     target_openssl_ver="1.1.1m"
     sudo bash -l -c "