diff --git a/nodes/core/core/75-exec.html b/nodes/core/core/75-exec.html
index 713cd9699..8d9d167f8 100644
--- a/nodes/core/core/75-exec.html
+++ b/nodes/core/core/75-exec.html
@@ -115,6 +115,7 @@
     the type of signal to be sent, for example, <code>SIGINT</code>, <code>SIGQUIT</code> or <code>SIGHUP</code>.
     Defaults to <code>SIGTERM</code> if set to an empty string.</p>
     <p>If the node has more than one process running then <code>msg.pid</code> must also be set with the value of the PID to be killed.</p>
+    <p>If a value is provided in the <code>Timeout</code> field then, if the process has not completed when the specified number of seconds has elapsed, the process will be killed automatically</p>
     <p>Tip: if running a Python app you may need to use the <code>-u</code> parameter to stop the output being buffered.</p>
 </script>