diff --git a/build/docker_install.sh b/build/docker_install.sh
index 18fa5a9..4e10a90 100644
--- a/build/docker_install.sh
+++ b/build/docker_install.sh
@@ -15,7 +15,7 @@ apk upgrade --update --no-cache \
 	git \
 	libmemcached-dev
 	
-echo 'apcu memcached' >> /usr/src/php-available-exts
+echo -e 'apcu memcached' >> /usr/src/php-available-exts
 	
 docker-php-source extract
 pecl install apcu-5.1.8