diff --git a/MathRenderer.php b/MathRenderer.php
index 23f9b82..1f601d0 100644
--- a/MathRenderer.php
+++ b/MathRenderer.php
@@ -120,7 +120,7 @@ abstract class MathRenderer {
 		array_shift( $parameters );
 		$errmsg = wfMessage( $msg, $parameters )->inContentLanguage()->escaped();
 		$source = htmlspecialchars( str_replace( "\n", ' ', $this->tex ) );
-		return "<strong class='error'>$mf($errmsg): $source</strong>\n";
+		return "<strong class='error texerror'>$mf($errmsg): $source</strong>\n";
 	}
 
 	/**
diff --git a/modules/MathJax/extensions/wiki2jax.js b/modules/MathJax/extensions/wiki2jax.js
index 07734c9..963e5d7 100644
--- a/modules/MathJax/extensions/wiki2jax.js
+++ b/modules/MathJax/extensions/wiki2jax.js
@@ -20,7 +20,7 @@ MathJax.Extension.wiki2jax = {
       this.configured = true;
     }
     var that = this;
-    $('span.tex, img.tex, strong.error', element || document).each(function(i, span) {
+    $('span.tex, img.tex, strong.texerror', element || document).each(function(i, span) {
 		that.ConvertMath(span);
 	});
   },