diff --git a/www/js/app.js b/www/js/app.js
index 64e20bcb..4b39d143 100644
--- a/www/js/app.js
+++ b/www/js/app.js
@@ -7401,6 +7401,21 @@ function setupTableOfContents () {
     var tableOfContents = new uiUtil.ToC(innerDoc);
     var headings = tableOfContents.getHeadingObjects();
 
+    if(headings.length <= 1) {
+        var dropupElement = document.getElementById('dropup');
+        dropupElement.classList.remove('btn-default');
+        dropupElement.style.pointerEvents = 'none';        
+        dropupElement.innerHTML = '<b>&nbsp;ToC&nbsp;</b>';
+        document.getElementById('ToCList').style.visibility = 'hidden';
+        return;
+    }else {        
+        var dropupElement = document.getElementById('dropup');
+        dropupElement.classList.add('btn-default');
+        dropupElement.style.pointerEvents = 'auto';        
+        dropupElement.innerHTML = '<b>&nbsp;ToC&nbsp;</b><span class="caret"></span>';
+        document.getElementById('ToCList').style.visibility = 'visible';
+    }
+
     dropup.style.fontSize = ~~(params.relativeUIFontSize * 0.14) + 'px';
     var dropupHtml = '';
     headings.forEach(function (heading) {