diff --git a/doc/src/sgml/sources.sgml b/doc/src/sgml/sources.sgml
index eb852627273b6bbba7cc60c35dd053ed369a8108..d132ee4a2edeeb801cf5880c767a7a4cd6deeda6 100644
--- a/doc/src/sgml/sources.sgml
+++ b/doc/src/sgml/sources.sgml
@@ -453,7 +453,7 @@ Hint:       the addendum
     verbose mode, or perhaps a pop-up error-details window.  Also, details and
     hints would normally be suppressed from the server log to save
     space. Reference to implementation details is best avoided since users
-    don't know the details anyway.
+    aren't expected to know the details.
    </para>
 
   </simplesect>