diff --git a/doc/overview.htm b/doc/overview.htm
index a008b38a..d77b266c 100644
--- a/doc/overview.htm
+++ b/doc/overview.htm
@@ -286,7 +286,7 @@ matrices.</p>
 <tr>
 <td><code>sasum</code> OR <code>dasum</code></td>
 <td><code>norm_1 (x)</code></td>
-<td><em>sum x<sub>i</sub></em></td>
+<td><em>sum |x<sub>i</sub>|</em></td>
 <td>Computes the <em>l<sub>1</sub></em> (sum) norm of a real vector.</td>
 </tr>
 <tr>