diff --git a/doc/html/index.html b/doc/html/index.html
index b9393d9..82b43c3 100644
--- a/doc/html/index.html
+++ b/doc/html/index.html
@@ -141,7 +141,7 @@ in the library.
     <td>&nbsp;&nbsp;Free a general context</td></tr>
 
 <tr><td><a href="pcre2_get_error_message.html">pcre2_get_error_message</a></td>
-    <td>&nbsp;&nbsp;Free study data</td></tr>
+    <td>&nbsp;&nbsp;Get textual error message for error number</td></tr>
 
 <tr><td><a href="pcre2_get_mark.html">pcre2_get_mark</a></td>
     <td>&nbsp;&nbsp;Get a (*MARK) name</td></tr>
diff --git a/doc/index.html.src b/doc/index.html.src
index b9393d9..82b43c3 100644
--- a/doc/index.html.src
+++ b/doc/index.html.src
@@ -141,7 +141,7 @@ in the library.
     <td>&nbsp;&nbsp;Free a general context</td></tr>
 
 <tr><td><a href="pcre2_get_error_message.html">pcre2_get_error_message</a></td>
-    <td>&nbsp;&nbsp;Free study data</td></tr>
+    <td>&nbsp;&nbsp;Get textual error message for error number</td></tr>
 
 <tr><td><a href="pcre2_get_mark.html">pcre2_get_mark</a></td>
     <td>&nbsp;&nbsp;Get a (*MARK) name</td></tr>