diff --git a/docs/manual/expr.xml b/docs/manual/expr.xml
index 790463f8a8..50cdf9b84c 100644
--- a/docs/manual/expr.xml
+++ b/docs/manual/expr.xml
@@ -482,7 +482,7 @@ listfunction ::= listfuncname "<strong>(</strong>" word "<strong>)</strong>"
         <td>Decode base64 encoded string, return truncated string if 0x00 is
             found</td><td></td></tr>
     <tr><td><code>sha1</code></td>
-        <td>Hash the string using SHA1, then encode the hash with base64
+        <td>Hash the string using SHA1, then encode the hash with hexadecimal
             encoding</td><td></td></tr>
     <tr><td><code>file</code></td>
         <td>Read contents from a file</td><td>yes</td></tr>