diff --git a/www/js/lib/uiUtil.js b/www/js/lib/uiUtil.js
index 4926f152..be398c74 100644
--- a/www/js/lib/uiUtil.js
+++ b/www/js/lib/uiUtil.js
@@ -848,7 +848,7 @@ define(rqDef, function(util) {
         if (providerAPI) {
             providerAPI.innerHTML = 'Search Provider: ' + (/^fulltext/.test(provider) ? 'Title + Xapian [' + provider :
                 'Title only [' + provider) + ']';
-            providerAPI.className = /^fulltext/.test(provider) ? 'apiAvailable' : 'apiUnavailable';
+            providerAPI.className = /^fulltext/.test(provider) ? 'apiAvailable' : !/ERROR/.test(provider) ? 'apiUnavailable' : 'apiBroken';
         }
     }
 
diff --git a/www/js/lib/zimArchive.js b/www/js/lib/zimArchive.js
index 62ee1015..fb729b06 100644
--- a/www/js/lib/zimArchive.js
+++ b/www/js/lib/zimArchive.js
@@ -104,7 +104,7 @@ define(['zimfile', 'zimDirEntry', 'transformZimit', 'util', 'uiUtil', 'utf8'],
                             // Update the API panel
                             uiUtil.reportSearchProviderToAPIStatusPanel(params.searchProvider);
                         }).catch(function (err) {
-                            uiUtil.reportSearchProviderToAPIStatusPanel(params.searchProvider);
+                            uiUtil.reportSearchProviderToAPIStatusPanel(params.searchProvider + ': ERROR');
                             console.error('The libzim worker could not be instantiated!', err);
                         });
                     } else {
@@ -113,7 +113,7 @@ define(['zimfile', 'zimDirEntry', 'transformZimit', 'util', 'uiUtil', 'utf8'],
                             params.searchProvider += ': no_fulltext'; message += 'this ZIM does not have a full-text index.';
                         } else if (isSplitZim) {
                             params.searchProvider += ': split_zim'; message += 'the ZIM archive is split.';
-                        } else {
+                        } else if (typeof Atomics === 'undefined') {
                             params.searchProvider += ': no_atomics'; message += 'this browser does not support Atomic operations.';
                         }
                         uiUtil.reportSearchProviderToAPIStatusPanel(params.searchProvider);