diff --git a/alpine/Dockerfile b/alpine/Dockerfile
index bd43e98..31de564 100644
--- a/alpine/Dockerfile
+++ b/alpine/Dockerfile
@@ -29,7 +29,7 @@ RUN ln -s /usr/include/x86_64-linux-gnu/gmp.h /usr/local/include/ \
     && mv ${PHANTOMJS} /usr/local/share \
     && ln -sf /usr/local/share/${PHANTOMJS}/bin/phantomjs /usr/local/bin \
     && rm -rf /var/lib/apt/lists/* \
-    && "php_admin_value[error_reporting] = E_ALL & ~E_NOTICE & ~E_WARNING & ~E_STRICT & ~E_DEPRECATED">>/usr/local/etc/php-fpm.d/www.conf
+    && echo "php_admin_value[error_reporting] = E_ALL & ~E_NOTICE & ~E_WARNING & ~E_STRICT & ~E_DEPRECATED">>/usr/local/etc/php-fpm.d/www.conf
 
 # set recommended PHP.ini settings
 # see https://secure.php.net/manual/en/opcache.installation.php