diff --git a/ambassador/ambassador/envoy/v2/v2route.py b/ambassador/ambassador/envoy/v2/v2route.py
index 90dbaf8d9e..1496483dbd 100644
--- a/ambassador/ambassador/envoy/v2/v2route.py
+++ b/ambassador/ambassador/envoy/v2/v2route.py
@@ -91,10 +91,10 @@ def __init__(self, config: 'V2Config', group: IRHTTPMappingGroup) -> None:
                 }
             }
 
-            idle_timeout_ms = group.get('idle_timeout_ms', None)
-
-            if idle_timeout_ms is not None:
-                route['idle_timeout'] = "%0.3fs" % (idle_timeout_ms / 1000.0)
+            if 'idle_timeout_ms' in group:
+                route['idle_timeout'] = "%0.3fs" % (group['idle_timeout_ms']/ 1000.0)
+            elif 'idle_timeout_ms' in config.ir.ambassador_module:
+                route['idle_timeout'] = "%0.3fs" % (config.ir.ambassador_module['idle_timeout_ms'] / 1000.0)
 
             if group.get('rewrite', None):
                 route['prefix_rewrite'] = group['rewrite']