diff --git a/doc/gmsh.html b/doc/gmsh.html
index 065d4c65af59d5edc9269028d480890c9d86409e..1924bf3dcb06e23f3a70cb9b17452c156f58d9e6 100644
--- a/doc/gmsh.html
+++ b/doc/gmsh.html
@@ -216,8 +216,9 @@ thumbnail"></a>
     <a href="/gmsh/gallery/tresse1.gif">pict1</a>,
     <a href="/gmsh/gallery/tresse2.gif">pict2</a>
     (D. Colignon).
-<li>2D colormap:
-    <a href="/gmsh/gallery/blob.gif">pict1</a>.
+<li>2D colormaps:
+    <a href="/gmsh/gallery/blob.gif">pict1</a>,
+    <a href="/gmsh/gallery/acoustic.png">pict2</a>.
 <li>Structured and unstructured grids of an extruded geometry:
     <a href="/gmsh/gallery/spirale.gif">pict1</a>.
 <li>Didactic animations about computational electromagnetism at