diff --git a/src/Behat/MinkExtension/Context/MinkContext.php b/src/Behat/MinkExtension/Context/MinkContext.php
index 0850ce3..75b1c25 100644
--- a/src/Behat/MinkExtension/Context/MinkContext.php
+++ b/src/Behat/MinkExtension/Context/MinkContext.php
@@ -373,7 +373,7 @@ class MinkContext extends RawMinkContext implements TranslatedContextInterface
      */
     public function assertNumElements($num, $element)
     {
-        $this->assertSession()->elementsCount('css', $element);
+        $this->assertSession()->elementsCount('css', $element, intval($num));
     }
 
     /**
diff --git a/src/Behat/MinkExtension/Context/MinkDictionary.php b/src/Behat/MinkExtension/Context/MinkDictionary.php
index f85a99c..895e451 100644
--- a/src/Behat/MinkExtension/Context/MinkDictionary.php
+++ b/src/Behat/MinkExtension/Context/MinkDictionary.php
@@ -438,7 +438,7 @@ trait MinkDictionary
      */
     public function assertNumElements($num, $element)
     {
-        $this->assertSession()->elementsCount('css', $element);
+        $this->assertSession()->elementsCount('css', $element, intval($num));
     }
 
     /**