diff --git a/php-base/Dockerfile b/php-base/Dockerfile
index b13f205c..4ed7d222 100644
--- a/php-base/Dockerfile
+++ b/php-base/Dockerfile
@@ -81,7 +81,7 @@ ENV NGINX_DIR=/etc/nginx \
 
 ARG RUNTIME_DISTRIBUTION="gcp-php-runtime-xenial-unstable"
 
-COPY ${RUNTIME_DISTRUBTION} /${RUNTIME_DISTRUBTION}
+COPY ${RUNTIME_DISTRIBUTION} /${RUNTIME_DISTRIBUTION}
 
 RUN mkdir -p $PHP_CONFIG_TEMPLATE
 COPY php-fpm.conf php.ini php-cli.ini "${PHP_CONFIG_TEMPLATE}/"