diff --git a/Parser.js b/Parser.js
index a785bcc7a..59c9cbc31 100644
--- a/Parser.js
+++ b/Parser.js
@@ -1,8 +1,7 @@
 var Lexer = require("./Lexer");
 
 // Main Parser class
-function Parser(options) {
-    this.options = options;
+function Parser() {
 };
 
 // Returned by the Parser.parse... functions. Stores the current results and
diff --git a/katex.js b/katex.js
index c9114250d..991bb3d84 100644
--- a/katex.js
+++ b/katex.js
@@ -130,15 +130,16 @@ var clearNode = function(node) {
 };
 
 var process = function(toParse, baseElem) {
-    var tree = parseTree(toParse);
-    if (tree) {
+    try {
+        var tree = parseTree(toParse);
         clearNode(baseElem);
         var expression = buildExpression(tree);
         for (var i = 0; i < expression.length; i++) {
             baseElem.appendChild(expression[i]);
         }
         return true;
-    } else {
+    } catch (e) {
+        console.error(e);
         return false;
     }
 };
diff --git a/parseTree.js b/parseTree.js
index c9e36c0f9..33ff81268 100644
--- a/parseTree.js
+++ b/parseTree.js
@@ -1,5 +1,5 @@
 var Parser = require("./Parser");
-var parser = new Parser({verbose: true});
+var parser = new Parser();
 
 var parseTree = function(toParse) {
     return parser.parse(toParse);