diff --git a/doc/src/sgml/btree-gin.sgml b/doc/src/sgml/btree-gin.sgml
index c9efe1cccf..f0cda0e32a 100644
--- a/doc/src/sgml/btree-gin.sgml
+++ b/doc/src/sgml/btree-gin.sgml
@@ -1,7 +1,8 @@
 <!-- doc/src/sgml/btree-gin.sgml -->
 
 <sect1 id="btree-gin" xreflabel="btree_gin">
- <title>btree_gin &mdash; GIN B-tree equivalent operator classes [trusted]</title>
+ <title>btree_gin &mdash;
+   GIN B-tree equivalent operator classes [trusted]</title>
 
  <indexterm zone="btree-gin">
   <primary>btree_gin</primary>
diff --git a/doc/src/sgml/isn.sgml b/doc/src/sgml/isn.sgml
index 27abdc8c66..8008c84fe4 100644
--- a/doc/src/sgml/isn.sgml
+++ b/doc/src/sgml/isn.sgml
@@ -1,8 +1,8 @@
 <!-- doc/src/sgml/isn.sgml -->
 
 <sect1 id="isn" xreflabel="isn">
- <title>isn &mdash;
-   data types for item numbers (ISBN, EAN, UPC, etc.) [trusted]</title>
+ <title>isn &mdash; data types for international standard numbers
+   (ISBN, EAN, UPC, etc.) [trusted]</title>
 
  <indexterm zone="isn">
   <primary>isn</primary>