1 files changed, 6 insertions, 3 deletions
diff --git a/src/HTML5/Serializer/OutputRules.php b/src/HTML5/Serializer/OutputRules.php
index bd97cb3..79b14b5 100644
--- a/src/HTML5/Serializer/OutputRules.php
+++ b/src/HTML5/Serializer/OutputRules.php
@@ -57,7 +57,7 @@ class OutputRules implements \HTML5\Serializer\RulesInterface {
         $this->inSvg = TRUE;
         $name = Elements::normalizeSvgElement($name);
         break;
-      case 'mathml':
+      case 'math':
         $this->inMathMl = TRUE;
         break;
     }
@@ -74,7 +74,7 @@ class OutputRules implements \HTML5\Serializer\RulesInterface {
       case 'svg':
         $this->inSvg = FALSE;
         break;
-      case 'mathml':
+      case 'math':
         $this->inMathMl = FALSE;
         break;
     }
@@ -158,7 +158,10 @@ class OutputRules implements \HTML5\Serializer\RulesInterface {
         $name = Elements::normalizeMathMlAttribute($name);
       }
 
-      $this->wr(' ')->wr($name)->wr('="')->wr($val)->wr('"');
+      $this->wr(' ')->wr($name);
+      if (!empty($val)) {
+        $this->wr('="')->wr($val)->wr('"');
+      }
     }
   }