diff --git a/piconfig/readonly.sh b/piconfig/readonly.sh
index 3ac9af0..e0c5244 100644
--- a/piconfig/readonly.sh
+++ b/piconfig/readonly.sh
@@ -22,7 +22,7 @@ tmpfs           /var/log        tmpfs   nosuid,nodev         0       0
 tmpfs           /var/tmp        tmpfs   nosuid,nodev         0       0
 EOT
 
-sudo cat <<EOT >>/etc/bash.bashrc
+sudo cat <<"EOT" >>/etc/bash.bashrc
 # set variable identifying the filesystem you work in (used in the prompt below)
 set_bash_prompt(){
     fs_mode=$(mount | sed -n -e "s/^\/dev\/.* on \/ .*(\(r[w|o]\).*/\1/p")