diff --git a/core/src/main/java/hudson/model/AbstractItem.java b/core/src/main/java/hudson/model/AbstractItem.java
index 81c20fba3a19da2102470eb8a0fae09b84f91ffe..5de5efb6248aa339a4e44bc58eaa5e884bb36b6c 100644
--- a/core/src/main/java/hudson/model/AbstractItem.java
+++ b/core/src/main/java/hudson/model/AbstractItem.java
@@ -127,7 +127,7 @@ public abstract class AbstractItem extends Actionable implements Item {
             String seed = Functions.getNearestAncestorUrl(req,this);
             if(seed!=null) {
                 // trim off the context path portion and leading '/', but add trailing '/'
-                return seed.substring(req.getServletContext().getContextPath().length()+1)+'/';
+                return seed.substring(req.getContextPath().length()+1)+'/';
             }
         }