diff --git a/README.md b/README.md
index fce69656df..df415e8606 100644
--- a/README.md
+++ b/README.md
@@ -35,12 +35,14 @@ bin/ocis-reva auth-basic & \
 bin/ocis-reva auth-bearer & \
 bin/ocis-reva sharing & \
 bin/ocis-reva storage-root & \
-bin/ocis-reva storage-home & \
+REVA_STORAGE_HOME_EXPOSE_DATA_SERVER=1 bin/ocis-reva storage-home & \
 bin/ocis-reva storage-home-data & \
-bin/ocis-reva storage-oc & \
+REVA_STORAGE_OC_EXPOSE_DATA_SERVER=1 bin/ocis-reva storage-oc & \
 bin/ocis-reva storage-oc-data
 ```
 
+The two env vars are needed to tell the reva gateway to use the dedicated data services when uploading files.
+
 The root storage serves the available namespaces from disk using the local storage driver. In order to be able to navigate into the `/home` and `/oc` storage providers you have to create these directories:
 ```
 mkdir /var/tmp/reva/root/home