diff --git a/sci-chemistry/ghemical/metadata.xml b/sci-chemistry/ghemical/metadata.xml
index 05b56d91546f9..90f25b17693ef 100644
--- a/sci-chemistry/ghemical/metadata.xml
+++ b/sci-chemistry/ghemical/metadata.xml
@@ -15,5 +15,6 @@ visualization tools are currently available.
   <use>
     <flag name="openbabel">Use <pkg>sci-chemistry/openbabel</pkg> for file
     conversions</flag>
+    <flag name="seamonkey">Add support for the Seamonkey web-browser</flag>
   </use>
 </pkgmetadata>