diff --git a/core/src/main/java/hudson/Functions.java b/core/src/main/java/hudson/Functions.java
index 2fe578d54d749720495093490fa01ecfee50a48f..acb29d88cc7cbe128ca8e5759792e6ec805b5d60 100644
--- a/core/src/main/java/hudson/Functions.java
+++ b/core/src/main/java/hudson/Functions.java
@@ -420,9 +420,12 @@ public class Functions {
 
     /**
      * Returns true if the current user has the given permission.
+     *
+     * @param permission
+     *      If null, returns true. This defaulting is convenient in making the use of this method terse.
      */
     public static boolean hasPermission(Permission permission) throws IOException, ServletException {
-        return Hudson.getInstance().getACL().hasPermission(permission);
+        return permission==null || Hudson.getInstance().getACL().hasPermission(permission);
     }
 
     public static void adminCheck(StaplerRequest req, StaplerResponse rsp, Object required, Permission permission) throws IOException, ServletException {