diff --git a/deployment/mistral/mistral-base.yaml b/deployment/mistral/mistral-base.yaml
index f4d9a073ea..f8a235f650 100644
--- a/deployment/mistral/mistral-base.yaml
+++ b/deployment/mistral/mistral-base.yaml
@@ -49,6 +49,10 @@ parameters:
     type: string
     default: 'noop'
     description: Driver or drivers to handle sending notifications.
+  MistralRpcResponseTimeout:
+    type: number
+    default: 120
+    description: Mistral RPC timeout
 
 conditions:
   service_debug_unset: {equals : [{get_param: MistralDebug}, '']}
@@ -75,7 +79,7 @@ outputs:
           - service_debug_unset
           - {get_param: Debug }
           - {get_param: MistralDebug }
-        mistral::rpc_response_timeout: 120
+        mistral::rpc_response_timeout: {get_param: MistralRpcResponseTimeout}
         mistral::keystone::authtoken::project_name: 'service'
         mistral::keystone::authtoken::user_domain_name: 'Default'
         mistral::keystone::authtoken::project_domain_name: 'Default'