diff --git a/alabaster/about.html b/alabaster/about.html
index b264ed4..a271855 100644
--- a/alabaster/about.html
+++ b/alabaster/about.html
@@ -28,7 +28,7 @@ <h1 class="logo"><a href="{{ pathto(master_doc) }}">{{ project }}</a></h1>
 <p>
 <a class="badge" href="{{ theme_travis_build_url }}">
     <img
-        alt="{{ theme_travis_badge_url }}"
+        alt="Travis CI build badge"
         src="{{ theme_travis_badge_url }}"
     />
 </a>