diff --git a/src/Illuminate/Validation/Factory.php b/src/Illuminate/Validation/Factory.php
index c415bb181dcd..d11fa9912664 100755
--- a/src/Illuminate/Validation/Factory.php
+++ b/src/Illuminate/Validation/Factory.php
@@ -45,6 +45,13 @@ class Factory implements FactoryContract
      */
     protected $implicitExtensions = [];
 
+    /**
+     * All of the custom dependent validator extensions.
+     *
+     * @var array
+     */
+    protected $dependentExtensions = [];
+
     /**
      * All of the custom validator message replacers.
      *
@@ -162,6 +169,8 @@ protected function addExtensions(Validator $validator)
         // array of data that is given to a validator instances via instantiation.
         $validator->addImplicitExtensions($this->implicitExtensions);
 
+        $validator->addDependentExtensions($this->dependentExtensions);
+
         $validator->addReplacers($this->replacers);
 
         $validator->setFallbackMessages($this->fallbackMessages);
@@ -201,6 +210,23 @@ public function extendImplicit($rule, $extension, $message = null)
         }
     }
 
+    /**
+     * Register a custom implicit validator extension.
+     *
+     * @param  string   $rule
+     * @param  \Closure|string  $extension
+     * @param  string  $message
+     * @return void
+     */
+    public function extendDependent($rule, $extension, $message = null)
+    {
+        $this->dependentExtensions[$rule] = $extension;
+
+        if ($message) {
+            $this->fallbackMessages[Str::snake($rule)] = $message;
+        }
+    }
+
     /**
      * Register a custom implicit validator message replacer.
      *
diff --git a/src/Illuminate/Validation/Validator.php b/src/Illuminate/Validation/Validator.php
index c44c5d5211b2..9a95c5d2ece7 100755
--- a/src/Illuminate/Validation/Validator.php
+++ b/src/Illuminate/Validation/Validator.php
@@ -812,6 +812,21 @@ public function addImplicitExtensions(array $extensions)
         }
     }
 
+    /**
+     * Register an array of custom implicit validator extensions.
+     *
+     * @param  array  $extensions
+     * @return void
+     */
+    public function addDependentExtensions(array $extensions)
+    {
+        $this->addExtensions($extensions);
+
+        foreach ($extensions as $rule => $extension) {
+            $this->dependentRules[] = Str::studly($rule);
+        }
+    }
+
     /**
      * Register a custom validator extension.
      *
@@ -838,6 +853,20 @@ public function addImplicitExtension($rule, $extension)
         $this->implicitRules[] = Str::studly($rule);
     }
 
+    /**
+     * Register a custom dependent validator extension.
+     *
+     * @param  string   $rule
+     * @param  \Closure|string  $extension
+     * @return void
+     */
+    public function addDependentExtension($rule, $extension)
+    {
+        $this->addExtension($rule, $extension);
+
+        $this->dependentRules[] = Str::studly($rule);
+    }
+
     /**
      * Register an array of custom validator message replacers.
      *
diff --git a/tests/Validation/ValidationFactoryTest.php b/tests/Validation/ValidationFactoryTest.php
index ba698eca6b85..a9bb826641c2 100755
--- a/tests/Validation/ValidationFactoryTest.php
+++ b/tests/Validation/ValidationFactoryTest.php
@@ -34,20 +34,22 @@ public function testMakeMethodCreatesValidValidator()
         };
         $factory->extend('foo', $noop1);
         $factory->extendImplicit('implicit', $noop2);
+        $factory->extendDependent('dependent', $noop3);
         $factory->replacer('replacer', $noop3);
         $factory->setPresenceVerifier($presence);
         $validator = $factory->make([], []);
-        $this->assertEquals(['foo' => $noop1, 'implicit' => $noop2], $validator->extensions);
+        $this->assertEquals(['foo' => $noop1, 'implicit' => $noop2, 'dependent' => $noop3], $validator->extensions);
         $this->assertEquals(['replacer' => $noop3], $validator->replacers);
         $this->assertEquals($presence, $validator->getPresenceVerifier());
 
         $presence = m::mock(PresenceVerifierInterface::class);
         $factory->extend('foo', $noop1, 'foo!');
         $factory->extendImplicit('implicit', $noop2, 'implicit!');
+        $factory->extendImplicit('dependent', $noop3, 'dependent!');
         $factory->setPresenceVerifier($presence);
         $validator = $factory->make([], []);
-        $this->assertEquals(['foo' => $noop1, 'implicit' => $noop2], $validator->extensions);
-        $this->assertEquals(['foo' => 'foo!', 'implicit' => 'implicit!'], $validator->fallbackMessages);
+        $this->assertEquals(['foo' => $noop1, 'implicit' => $noop2, 'dependent' => $noop3], $validator->extensions);
+        $this->assertEquals(['foo' => 'foo!', 'implicit' => 'implicit!', 'dependent' => 'dependent!'], $validator->fallbackMessages);
         $this->assertEquals($presence, $validator->getPresenceVerifier());
     }
 
diff --git a/tests/Validation/ValidationValidatorTest.php b/tests/Validation/ValidationValidatorTest.php
index c2ba2093aab3..0aadad34ca6d 100755
--- a/tests/Validation/ValidationValidatorTest.php
+++ b/tests/Validation/ValidationValidatorTest.php
@@ -2518,6 +2518,21 @@ public function testCustomImplicitValidators()
         $this->assertTrue($v->passes());
     }
 
+    public function testCustomDependentValidators()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $v = new Validator($trans,
+            [
+                ['name' => 'Jamie', 'age' => 27],
+            ],
+            ['*.name' => 'dependent_rule:*.age']
+        );
+        $v->addDependentExtension('dependent_rule', function ($name) use ($v) {
+            return array_get($v->getData(), $name) == 'Jamie';
+        });
+        $this->assertTrue($v->passes());
+    }
+
     /**
      * @expectedException InvalidArgumentException
      */