diff --git a/Documentation/NuttShell.html b/Documentation/NuttShell.html
index 83d21d0f89d..3e64ca0588b 100644
--- a/Documentation/NuttShell.html
+++ b/Documentation/NuttShell.html
@@ -2652,8 +2652,9 @@ nsh> time "sleep 2"
 nsh>
 </pre></ul>
 <p>
-  The additional 10 millseconds in this example is due primarily to the quantization error in the timing (this setup used a 10 millisecond periodic system timer).
-  Other sources of error could include the additional overhead of the time command execution itself which is included in the total.
+  The additional 10 millseconds in this example is due to the way that the sleep command works: It always waits one system clock tick longer than requested and this test setup used a 10 millisecond periodic system
+  timer.
+  Sources of error could include the additional overhead of the time command execution itself which is included in the total and various quantization errors.
 </p>
 <p>
   Notice that: