diff --git a/src/commands/math/commands.js b/src/commands/math/commands.js
index 4d0cc2e..2b34635 100644
--- a/src/commands/math/commands.js
+++ b/src/commands/math/commands.js
@@ -134,9 +134,6 @@
       })
     ;
   };
-  _.isStyleBlock = function() {
-    return true;
-  };
   _.latex = function() {
     return '\\class{' + this.cls + '}{' + this.blocks[0].latex() + '}';
   };