diff --git a/UPGRADE-2.7.md b/UPGRADE-2.7.md
index f491c7d471..7d532cf322 100644
--- a/UPGRADE-2.7.md
+++ b/UPGRADE-2.7.md
@@ -528,3 +528,9 @@ Config
  * The `__toString()` method of the `\Symfony\Component\Config\ConfigCache` is marked as 
    deprecated in favor of the new `getPath()` method.
    
+Validator
+---------
+
+ * The PHP7-incompatible constraints (Null, True, False) and related validators
+   (NullValidator, TrueValidator, FalseValidator) are marked as deprecated
+   in favor of their `Is`-prefixed equivalent.
diff --git a/src/Symfony/Component/Validator/CHANGELOG.md b/src/Symfony/Component/Validator/CHANGELOG.md
index db44225058..4531286fdb 100644
--- a/src/Symfony/Component/Validator/CHANGELOG.md
+++ b/src/Symfony/Component/Validator/CHANGELOG.md
@@ -5,6 +5,7 @@ CHANGELOG
 -----
 
  * deprecated `DefaultTranslator` in favor of `Symfony\Component\Translation\IdentityTranslator`
+ * deprecated PHP7-incompatible constraints (Null, True, False) and related validators (NullValidator, TrueValidator, FalseValidator) in favor of their `Is`-prefixed equivalent
 
 2.6.0
 -----
diff --git a/src/Symfony/Component/Validator/Constraints/False.php b/src/Symfony/Component/Validator/Constraints/False.php
index 6ec76ee3d1..9e9f6ed3d2 100644
--- a/src/Symfony/Component/Validator/Constraints/False.php
+++ b/src/Symfony/Component/Validator/Constraints/False.php
@@ -11,12 +11,14 @@
 
 namespace Symfony\Component\Validator\Constraints;
 
+trigger_error('The '.__NAMESPACE__.'\False class is deprecated since version 2.7 and will be removed in 3.0. Use the IsFalse class in the same namespace instead.', E_USER_DEPRECATED);
+
 /**
  * @Annotation
  * @Target({"PROPERTY", "METHOD", "ANNOTATION"})
  *
  * @author Bernhard Schussek <bschussek@gmail.com>
  *
- * @api
+ * @deprecated since version 2.7, to be removed in 3.0. Use IsFalse instead.
  */
 class False extends IsFalse {}
diff --git a/src/Symfony/Component/Validator/Constraints/FalseValidator.php b/src/Symfony/Component/Validator/Constraints/FalseValidator.php
index 72fd1d44d1..534400e9c6 100644
--- a/src/Symfony/Component/Validator/Constraints/FalseValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/FalseValidator.php
@@ -11,9 +11,11 @@
 
 namespace Symfony\Component\Validator\Constraints;
 
+trigger_error('The '.__NAMESPACE__.'\FalseValidator class is deprecated since version 2.7 and will be removed in 3.0. Use the IsFalseValidator class in the same namespace instead.', E_USER_DEPRECATED);
+
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  *
- * @api
+ * @deprecated since version 2.7, to be removed in 3.0. Use IsFalseValidator instead.
  */
 class FalseValidator extends IsFalseValidator {}
diff --git a/src/Symfony/Component/Validator/Constraints/Null.php b/src/Symfony/Component/Validator/Constraints/Null.php
index 5ad789cef8..1031b482cd 100644
--- a/src/Symfony/Component/Validator/Constraints/Null.php
+++ b/src/Symfony/Component/Validator/Constraints/Null.php
@@ -11,12 +11,14 @@
 
 namespace Symfony\Component\Validator\Constraints;
 
+trigger_error('The '.__NAMESPACE__.'\Null class is deprecated since version 2.7 and will be removed in 3.0. Use the IsNull class in the same namespace instead.', E_USER_DEPRECATED);
+
 /**
  * @Annotation
  * @Target({"PROPERTY", "METHOD", "ANNOTATION"})
  *
  * @author Bernhard Schussek <bschussek@gmail.com>
  *
- * @api
+ * @deprecated since version 2.7, to be removed in 3.0. Use IsNull instead.
  */
 class Null extends IsNull {}
diff --git a/src/Symfony/Component/Validator/Constraints/NullValidator.php b/src/Symfony/Component/Validator/Constraints/NullValidator.php
index 876924f375..721c95148f 100644
--- a/src/Symfony/Component/Validator/Constraints/NullValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/NullValidator.php
@@ -11,9 +11,11 @@
 
 namespace Symfony\Component\Validator\Constraints;
 
+trigger_error('The '.__NAMESPACE__.'\NullValidator class is deprecated since version 2.7 and will be removed in 3.0. Use the IsNullValidator class in the same namespace instead.', E_USER_DEPRECATED);
+
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  *
- * @api
+ * @deprecated since version 2.7, to be removed in 3.0. Use IsNullValidator instead.
  */
 class NullValidator extends IsNullValidator {}
diff --git a/src/Symfony/Component/Validator/Constraints/True.php b/src/Symfony/Component/Validator/Constraints/True.php
index 832b84b92b..f09b084119 100644
--- a/src/Symfony/Component/Validator/Constraints/True.php
+++ b/src/Symfony/Component/Validator/Constraints/True.php
@@ -11,12 +11,14 @@
 
 namespace Symfony\Component\Validator\Constraints;
 
+trigger_error('The '.__NAMESPACE__.'\True class is deprecated since version 2.7 and will be removed in 3.0. Use the IsTrue class in the same namespace instead.', E_USER_DEPRECATED);
+
 /**
  * @Annotation
  * @Target({"PROPERTY", "METHOD", "ANNOTATION"})
  *
  * @author Bernhard Schussek <bschussek@gmail.com>
  *
- * @api
+ * @deprecated since version 2.7, to be removed in 3.0. Use IsTrue instead.
  */
 class True extends IsTrue {}
diff --git a/src/Symfony/Component/Validator/Constraints/TrueValidator.php b/src/Symfony/Component/Validator/Constraints/TrueValidator.php
index fb0b7d6cdd..5d17bdba35 100644
--- a/src/Symfony/Component/Validator/Constraints/TrueValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/TrueValidator.php
@@ -11,9 +11,11 @@
 
 namespace Symfony\Component\Validator\Constraints;
 
+trigger_error('The '.__NAMESPACE__.'\TrueValidator class is deprecated since version 2.7 and will be removed in 3.0. Use the IsTrueValidator class in the same namespace instead.', E_USER_DEPRECATED);
+
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  *
- * @api
+ * @deprecated since version 2.7, to be removed in 3.0. Use IsTrueValidator instead.
  */
 class TrueValidator extends IsTrueValidator {}