diff --git a/ner.edith.html b/ner.edith.html
index 4a2eb74..b76bde0 100644
--- a/ner.edith.html
+++ b/ner.edith.html
@@ -52,7 +52,7 @@
     <div class="row mt-3">
         <div class="col-2" id="region-left">
             <a href="" id="preview-link">
-                <img id="preview" class="img-responsive fit-image"/>
+                <img id="preview" alt="facsimile_preview" class="img-responsive fit-image"/>
             </a>
         </div>
         <div class="col-8 text-center" id="tableregion">