diff --git a/offlineimap.sgml b/offlineimap.sgml
index 82b1179..352f8aa 100644
--- a/offlineimap.sgml
+++ b/offlineimap.sgml
@@ -708,6 +708,24 @@ def test_mycmp():
+
+
+ Signals
+
+ OfflineIMAP writes its current PID into
+ ~/.offlineimap/pid when it is
+ running. It is not guaranteed that this file will
+ not exist when OfflineIMAP is not running.
+
+
+
Errors