diff --git a/plugins.js b/plugins.js
index 4d3c9f9..ef85d72 100644
--- a/plugins.js
+++ b/plugins.js
@@ -183,6 +183,9 @@ P._normalizeChallenge = function(name, ch) {
         }
         gch.get = wrappy(ch.get);
     }
+    if (ch.propagationDelay) {
+        gch.propagationDelay = ch.propagationDelay;
+    }
 
     return gch;
 };