diff --git a/src/Symfony/Component/Config/Definition/Builder/BooleanNodeDefinition.php b/src/Symfony/Component/Config/Definition/Builder/BooleanNodeDefinition.php
index db7ebc2411..7f8eb2681d 100644
--- a/src/Symfony/Component/Config/Definition/Builder/BooleanNodeDefinition.php
+++ b/src/Symfony/Component/Config/Definition/Builder/BooleanNodeDefinition.php
@@ -30,6 +30,18 @@ class BooleanNodeDefinition extends ScalarNodeDefinition
         $this->nullEquivalent = true;
     }
 
+    /**
+     * {@inheritdoc}
+     *
+     * @deprecated Deprecated since version 2.8, to be removed in 3.0.
+     */
+    public function cannotBeEmpty()
+    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since version 2.8 and will be removed in 3.0.', E_USER_DEPRECATED);
+
+        return parent::cannotBeEmpty();
+    }
+
     /**
      * Instantiate a Node.
      *
diff --git a/src/Symfony/Component/Config/Definition/Builder/NumericNodeDefinition.php b/src/Symfony/Component/Config/Definition/Builder/NumericNodeDefinition.php
index ddd716d06a..a1cd49b73c 100644
--- a/src/Symfony/Component/Config/Definition/Builder/NumericNodeDefinition.php
+++ b/src/Symfony/Component/Config/Definition/Builder/NumericNodeDefinition.php
@@ -58,4 +58,16 @@ abstract class NumericNodeDefinition extends ScalarNodeDefinition
 
         return $this;
     }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @deprecated Deprecated since version 2.8, to be removed in 3.0.
+     */
+    public function cannotBeEmpty()
+    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since version 2.8 and will be removed in 3.0.', E_USER_DEPRECATED);
+
+        return parent::cannotBeEmpty();
+    }
 }