diff --git a/roles/custom/matrix-rageshake/defaults/main.yml b/roles/custom/matrix-rageshake/defaults/main.yml
index 3568d23f8..4f574d3f6 100644
--- a/roles/custom/matrix-rageshake/defaults/main.yml
+++ b/roles/custom/matrix-rageshake/defaults/main.yml
@@ -29,6 +29,8 @@ matrix_rageshake_systemd_required_services_list: ["docker.service"]
 # List of systemd services that matrix-rageshake.service wants
 matrix_rageshake_systemd_wanted_services_list: []
 
+matrix_rageshake_config_api_prefix: "https://{{ matrix_server_fqn_rageshake }}/api/"
+
 # Rageshake Settings
 
 # Additional config  to pass to the rageshake.
diff --git a/roles/custom/matrix-rageshake/templates/config.j2 b/roles/custom/matrix-rageshake/templates/config.j2
index 2b0d64b7a..08c90438c 100644
--- a/roles/custom/matrix-rageshake/templates/config.j2
+++ b/roles/custom/matrix-rageshake/templates/config.j2
@@ -1,2 +1,2 @@
-api_prefix: "https://{{ matrix_server_fqn_rageshake }}/api/"
+api_prefix: {{ matrix_rageshake_config_api_prefix | to_json }}
 {{ matrix_rageshake_config | to_nice_yaml(indent=2, width=999999) }}