diff --git a/doc/heapprofile.html b/doc/heapprofile.html
index d2ff52c..3986a25 100644
--- a/doc/heapprofile.html
+++ b/doc/heapprofile.html
@@ -107,7 +107,7 @@ environment variables.</p>
 
 <tr valign=top>
   <td><code>HEAP_PROFILE_TIME_INTERVAL</code></td>
-  <td>default: 104857600 (100 Mb)</td>
+  <td>default: 0</td>
   <td>
     Dump heap profiling information each time the specified
     number of seconds has elapsed.