diff --git a/installers/common.sh b/installers/common.sh
index 424155f..9748bcf 100755
--- a/installers/common.sh
+++ b/installers/common.sh
@@ -386,7 +386,7 @@ function optimize_php() {
 
 function build_R1 () {
   if [ -f /boot/armbianEnv.txt]; then
-    sudo sed -i "1i extraargs=net.ifnames=0" /boot/armbianEnv.txt
+    sudo sed -i '1i extraargs=net.ifnames=0' /boot/armbianEnv.txt
   fi
 }