diff --git a/src/Dockerfile b/src/Dockerfile
index 8a05b55..fbced42 100644
--- a/src/Dockerfile
+++ b/src/Dockerfile
@@ -14,7 +14,7 @@ RUN bash -ex install.sh 2>&1 && \
 
 # php config start passes special ENVs into
 ARG PHP_ENV_CONFIG
-ENV PHP_ENV_CONFIG /etc/lighttpd/conf-enabled/15-fastcgi-php.conf
+ENV PHP_ENV_CONFIG /etc/lighttpd/conf-enabled/15-pihole-admin.conf
 ARG PHP_ERROR_LOG
 ENV PHP_ERROR_LOG /var/log/lighttpd/error-pihole.log
 
diff --git a/src/s6/debian-root/usr/local/bin/bash_functions.sh b/src/s6/debian-root/usr/local/bin/bash_functions.sh
index 85ff87e..92ef399 100644
--- a/src/s6/debian-root/usr/local/bin/bash_functions.sh
+++ b/src/s6/debian-root/usr/local/bin/bash_functions.sh
@@ -353,8 +353,8 @@ setup_web_php_env() {
     fi;
 
     for config_var in "VIRTUAL_HOST" "CORS_HOSTS" "PHP_ERROR_LOG" "PIHOLE_DOCKER_TAG" "TZ"; do
-      local beginning_of_line="\t\t\t\"${config_var}\" => "
-      if grep -qP "$beginning_of_line" "$PHP_ENV_CONFIG" ; then
+      local beginning_of_line="                    \"${config_var}\" => "
+      if grep -qP "^$beginning_of_line" "$PHP_ENV_CONFIG" ; then
         # replace line if already present
         sed -i "/${beginning_of_line}/c\\${beginning_of_line}\"${!config_var}\"," "$PHP_ENV_CONFIG"
       else