diff --git a/lib/renderer.js b/lib/renderer.js
index 6177fa5..78a693f 100644
--- a/lib/renderer.js
+++ b/lib/renderer.js
@@ -9,7 +9,6 @@
 
 
 var assign          = require('./common/utils').assign;
-var has             = require('./common/utils').has;
 var unescapeMd      = require('./common/utils').unescapeMd;
 var replaceEntities = require('./common/utils').replaceEntities;
 var escapeHtml      = require('./common/utils').escapeHtml;
@@ -38,29 +37,15 @@ rules.code = function (tokens, idx /*, options, env */) {
 };
 
 
-rules.fence = function (tokens, idx, options, env, self) {
+rules.fence = function (tokens, idx, options /*, env, self*/) {
   var token = tokens[idx];
   var langClass = '';
   var langPrefix = options.langPrefix;
-  var langName = '', fenceName;
+  var langName = '';
   var highlighted;
 
   if (token.params) {
-
-    //
-    // ```foo bar
-    //
-    // Try custom renderer "foo" first. That will simplify overwrite
-    // for diagrams, latex, and any other fenced block with custom look
-    //
-
-    fenceName = token.params.split(/\s+/g)[0];
-
-    if (has(self.rules.fence_custom, fenceName)) {
-      return self.rules.fence_custom[fenceName](tokens, idx, options, env, self);
-    }
-
-    langName = escapeHtml(replaceEntities(unescapeMd(fenceName)));
+    langName = escapeHtml(replaceEntities(unescapeMd(token.params.split(/\s+/g)[0])));
     langClass = ' class="' + langPrefix + langName + '"';
   }
 
@@ -76,7 +61,6 @@ rules.fence = function (tokens, idx, options, env, self) {
         + '</code></pre>\n';
 };
 
-rules.fence_custom = {};
 
 rules.heading_open = function (tokens, idx /*, options, env */) {
   return '<h' + tokens[idx].hLevel + '>';
diff --git a/test/misc.js b/test/misc.js
index 6f1a4d9..ce9f79a 100644
--- a/test/misc.js
+++ b/test/misc.js
@@ -236,23 +236,3 @@ describe('Links validation', function () {
   });
 
 });
-
-
-describe('Custom fences', function () {
-
-  it('should render differently overriden rule', function () {
-    var md = markdownit();
-
-    md.renderer.rules.fence_custom.foo = function (tokens, idx /*, options, env */) {
-      return '<div class="foo">' +
-             md.utils.escapeHtml(tokens[idx].content) +
-             '</div>\n';
-    };
-
-    var text = '```foo bar\n' +
-               '123&45\n' +
-               '```';
-    assert.strictEqual(md.render(text), '<div class="foo">123&amp;45\n</div>\n');
-  });
-
-});