diff --git a/com.google.eclipse.tm.terminal/src/com/google/eclipse/tm/internal/terminal/util/BoundedByteBuffer.java b/com.google.eclipse.tm.terminal/src/com/google/eclipse/tm/internal/terminal/util/BoundedByteBuffer.java
index d0e5bac..f28dcfe 100644
--- a/com.google.eclipse.tm.terminal/src/com/google/eclipse/tm/internal/terminal/util/BoundedByteBuffer.java
+++ b/com.google.eclipse.tm.terminal/src/com/google/eclipse/tm/internal/terminal/util/BoundedByteBuffer.java
@@ -64,7 +64,7 @@
   }
 
   public void write(byte[] b, int off, int len) throws InterruptedException {
-    assert len <= getFreeSlots();
+    Assert.isTrue(len <= getFreeSlots());
     while (usedSlots == buffer.length) {
       // Wait until not full.
       wait();