diff --git a/core/src/main/java/hudson/model/Queue.java b/core/src/main/java/hudson/model/Queue.java
index 63cebcddb8469bb59048001417180859f0d291f0..74db2f43f233eef6ecbfc00e686d2cb8864cedf8 100644
--- a/core/src/main/java/hudson/model/Queue.java
+++ b/core/src/main/java/hudson/model/Queue.java
@@ -529,6 +529,10 @@ public class Queue extends ResourceController {
         /**
          * Returns true if the execution should be blocked
          * for temporary reasons.
+         *
+         * <p>
+         * This can be used to define mutual exclusion that goes beyond
+         * {@link #getResourceList()}.
          */
         boolean isBuildBlocked();