diff --git a/src/Compiler.php b/src/Compiler.php
index 0efdd37b..30ece138 100644
--- a/src/Compiler.php
+++ b/src/Compiler.php
@@ -943,9 +943,9 @@ protected function compileChild($child, $out)
             case 'mixin_content':
                 $content = $this->get(self::$namespaces['special'] . 'content');
 
-                if (!isset($content)) {
-                    $this->throwError('Expected @content inside of mixin');
-                }
+		if (!is_object($content)) {
+                    return;
+		}
 
                 $strongTypes = array('include', 'block', 'for', 'while');
 
@@ -1244,7 +1244,7 @@ protected function normalizeNumber($number)
         if (isset(self::$unitTable['in'][$unit])) {
             $conv = self::$unitTable['in'][$unit];
 
-            return array('number', $value / $conv, 'in');
+            return array('number', (float) $value / (float) $conv, 'in');
         }
 
         return $number;