diff --git a/coreos-config/roles/compose_project/templates/matrix/synapse-config/homeserver.yaml b/coreos-config/roles/compose_project/templates/matrix/synapse-config/homeserver.yaml
index 8bbd085..24a3609 100644
--- a/coreos-config/roles/compose_project/templates/matrix/synapse-config/homeserver.yaml
+++ b/coreos-config/roles/compose_project/templates/matrix/synapse-config/homeserver.yaml
@@ -99,5 +99,18 @@ modules:
         # - authenticate using `m.login.password` requests, instead of ``com.devture.shared_secret_auth` requests
         # com_devture_shared_secret_auth_support_enabled: false
 
+media_storage_providers:
+  - module: s3_storage_provider.S3StorageProviderBackend
+    store_local: True
+    store_remote: True
+    store_synchronous: True
+    config:
+      bucket: "{{ matrix.storage.s3.bucket }}"
+      # All of the below options are optional, for use with non-AWS S3-like
+      # services, or to specify access tokens here instead of some external method.
+      endpoint_url: "{{ matrix.storage.s3.endpoint_url }}"
+      access_key_id: "{{ matrix.storage.s3.access_key_id }}"
+      secret_access_key: "{{ matrix.storage.s3.secret_access_key }}"
+
 
 # vim:ft=yaml