diff --git a/powerlevel9k.zsh-theme b/powerlevel9k.zsh-theme
index 10d1564e..368254ee 100755
--- a/powerlevel9k.zsh-theme
+++ b/powerlevel9k.zsh-theme
@@ -441,7 +441,7 @@ prompt_public_ip() {
     timediff=$(($(date +%s) - $(date -r $POWERLEVEL9K_PUBLIC_IP_FILE +%s)))
     [[ $timediff -gt $POWERLEVEL9K_PUBLIC_IP_TIMOUT ]] && refresh_ip=true
     # If tmp file is empty get a fresh IP
-    [[ -z $(cat $POWERLEVEL9K_PUBLIC_IP_FILE) || $(cat $POWERLEVEL9K_PUBLIC_IP_FILE) =~ $POWERLEVEL9K_PUBLIC_IP_NONE ]] && refresh_ip=true
+    [[ -z $(cat $POWERLEVEL9K_PUBLIC_IP_FILE) || $(cat $POWERLEVEL9K_PUBLIC_IP_FILE) =~ '$POWERLEVEL9K_PUBLIC_IP_NONE' ]] && refresh_ip=true
   else
     touch $POWERLEVEL9K_PUBLIC_IP_FILE && refresh_ip=true
   fi