diff --git a/templates/php-apache/docker-compose.yml b/templates/php-apache/docker-compose.yml
index 977ac30..b0a4c9b 100644
--- a/templates/php-apache/docker-compose.yml
+++ b/templates/php-apache/docker-compose.yml
@@ -13,7 +13,7 @@ services:
       - ${PHP_WEB_ROOT:-./app}:/var/www/html
     command: >
       /bin/bash -c "
-      if [ -n \"${PHP_EXTENSIONS+x}\" ]; then
+      if [ -n $${PHP_EXTENSIONS+x} ]; then
         docker-php-ext-install $$PHP_EXTENSIONS || { 
           echo 'Error installing PHP extensions via docker-php-ext-install - check your docker-compose.yml command: section'; 
           exit 1;