diff --git a/rtlwifi-setup.sh b/rtlwifi-setup.sh
index 9ba9564..7a85177 100755
--- a/rtlwifi-setup.sh
+++ b/rtlwifi-setup.sh
@@ -30,7 +30,7 @@ _apply_patch(){
 }
 
 _install(){
-    sed -i 's/PACKAGE_VERSION="@PKGVER@"/PACKAGE_VERSION="git"/g' /usr/src/rtl88x2bu-git/dkms.conf
+    sudo sed -i 's/PACKAGE_VERSION="@PKGVER@"/PACKAGE_VERSION="git"/g' /usr/src/rtl88x2bu-git/dkms.conf
     sudo dkms add -m rtl88x2bu -v git
     sudo dkms autoinstall
     sudo modprobe 88x2bu