diff --git a/core/src/main/java/hudson/model/Queue.java b/core/src/main/java/hudson/model/Queue.java
index 0938ac9cb0..b2c4f7135a 100644
--- a/core/src/main/java/hudson/model/Queue.java
+++ b/core/src/main/java/hudson/model/Queue.java
@@ -2487,10 +2487,10 @@ public class Queue extends ResourceController implements Saveable {
 
         public CauseOfBlockage getCauseOfBlockage() {
             long diff = timestamp.getTimeInMillis() - System.currentTimeMillis();
-            if (diff > 0)
+            if (diff >= 0)
                 return CauseOfBlockage.fromMessage(Messages._Queue_InQuietPeriod(Util.getTimeSpanString(diff)));
             else
-                return CauseOfBlockage.fromMessage(Messages._Queue_Unknown());
+                return CauseOfBlockage.fromMessage(Messages._Queue_FinishedWaiting());
         }
 
         @Override
diff --git a/core/src/main/resources/hudson/model/Messages.properties b/core/src/main/resources/hudson/model/Messages.properties
index 191592641f..e136e683d1 100644
--- a/core/src/main/resources/hudson/model/Messages.properties
+++ b/core/src/main/resources/hudson/model/Messages.properties
@@ -200,6 +200,7 @@ Queue.InProgress=A build is already in progress
 Queue.InQuietPeriod=In the quiet period. Expires in {0}
 Queue.NodeOffline=\u2018{0}\u2019 is offline
 Queue.Unknown=???
+Queue.FinishedWaiting=Finished waiting
 Queue.WaitingForNextAvailableExecutor=Waiting for next available executor
 Queue.WaitingForNextAvailableExecutorOn=Waiting for next available executor on \u2018{0}\u2019
 Queue.init=Restoring the build queue