diff --git a/remoting/src/main/java/hudson/remoting/PipeWindow.java b/remoting/src/main/java/hudson/remoting/PipeWindow.java
index bd41b1dfec..db3209829f 100644
--- a/remoting/src/main/java/hudson/remoting/PipeWindow.java
+++ b/remoting/src/main/java/hudson/remoting/PipeWindow.java
@@ -139,7 +139,7 @@ abstract class PipeWindow {
                 if (available>0)
                     return available;
 
-                while (available==0) {
+                while (available<=0) {
                     wait();
                 }
             }