diff --git a/Dockerfile-debian.template b/Dockerfile-debian.template
index 8b66dd34..4be1f62b 100644
--- a/Dockerfile-debian.template
+++ b/Dockerfile-debian.template
@@ -107,9 +107,9 @@ RUN { \
     echo 'apc.enable_cli=1' >> "${PHP_INI_DIR}/conf.d/docker-php-ext-apcu.ini"; \
     \
     { \
-        echo 'memory_limit=${PHP_MEMORY_LIMIT}'; \
-        echo 'upload_max_filesize=${PHP_UPLOAD_LIMIT}'; \
-        echo 'post_max_size=${PHP_UPLOAD_LIMIT}'; \
+        echo "memory_limit=${PHP_MEMORY_LIMIT}"; \
+        echo "upload_max_filesize=${PHP_UPLOAD_LIMIT}"; \
+        echo "post_max_size=${PHP_UPLOAD_LIMIT}"; \
     } > "${PHP_INI_DIR}/conf.d/nextcloud.ini"; \
     \
     mkdir /var/www/data; \