diff --git a/reference/exec/reference.xml b/reference/exec/reference.xml
index f9ac7375d8..5c499a307e 100644
--- a/reference/exec/reference.xml
+++ b/reference/exec/reference.xml
@@ -1,5 +1,5 @@
-
+
@@ -44,6 +44,16 @@
&no.constants;
+
+ &reftitle.notes;
+
+
+ Open files with lock (especially open sessions) should be closed before
+ executing a program in the bacground.
+
+
+
+