diff --git a/roles/matrix-synapse/tasks/synapse/setup_install.yml b/roles/matrix-synapse/tasks/synapse/setup_install.yml
index 2941a23b2..3f7613271 100644
--- a/roles/matrix-synapse/tasks/synapse/setup_install.yml
+++ b/roles/matrix-synapse/tasks/synapse/setup_install.yml
@@ -130,7 +130,7 @@
     mode: 0755
 
 - set_fact:
-    media_storage_providers: |
+    matrix_synapse_media_storage_providers: |
       {{
         matrix_synapse_media_storage_providers|default([])
         +