diff --git a/doc/src/sgml/oper.sgml b/doc/src/sgml/oper.sgml
index f57e981a76..ac7644dd80 100644
--- a/doc/src/sgml/oper.sgml
+++ b/doc/src/sgml/oper.sgml
@@ -172,7 +172,7 @@ start of interval
 </row>
 <row>
 <entry>
-* /
+* / %
 </entry>
 <entry>
 left