diff --git a/src/Object/AbstractCollection.php b/src/Object/AbstractCollection.php
index c55e688c..0592bdfd 100644
--- a/src/Object/AbstractCollection.php
+++ b/src/Object/AbstractCollection.php
@@ -36,6 +36,7 @@
 
 namespace Nosto\Object;
 
+use Countable;
 use Iterator;
 
 /**
@@ -43,7 +44,7 @@
  * functionality to validate the items added to the collection. The collection behaves
  * like an array. making it easy to add items to it and iterate over it.
  */
-abstract class AbstractCollection implements Iterator
+abstract class AbstractCollection implements Iterator, Countable
 {
 
     protected $var = array();
@@ -80,6 +81,14 @@ public function next()
         return next($this->var);
     }
 
+    /**
+     * @see Iterator::next()
+     */
+    public function count()
+    {
+        return count($this->var);
+    }
+
     /**
      * @see Iterator::valid()
      */