diff --git a/lang/en.php b/lang/en.php
index 36c3358..8e14f78 100644
--- a/lang/en.php
+++ b/lang/en.php
@@ -23,7 +23,8 @@ return array(
     'dateFormat' => "must be date with format '%s'",
     'dateBefore' => "must be date before '%s'",
     'dateAfter' => "must be date after '%s'",
-    'contains' => "must contain %s"
+    'contains' => "must contain %s",
+    'boolean' => "must be a boolean",
 );
 
 
diff --git a/src/Valitron/Validator.php b/src/Valitron/Validator.php
index d80a544..40a76fc 100644
--- a/src/Valitron/Validator.php
+++ b/src/Valitron/Validator.php
@@ -430,6 +430,18 @@ class Validator
         return $vtime > $ptime;
     }
 
+    /**
+     * Validate that a field contains a boolean.
+     *
+     * @param  string  $field
+     * @param  mixed   $value
+     * @return bool
+     */
+    protected function validateBoolean($field, $value)
+    {
+        return (is_bool($value)) ? true : false;
+    }
+
     /**
      *  Get array of fields and data
      */
diff --git a/tests/Valitron/ValidateTest.php b/tests/Valitron/ValidateTest.php
index a474b04..34f8cca 100644
--- a/tests/Valitron/ValidateTest.php
+++ b/tests/Valitron/ValidateTest.php
@@ -640,6 +640,20 @@ class ValidateTest extends BaseTestCase
         $v->rule('testRule', 'name', array('foo', 'bar'))->message('Invalid name selected.');
         $this->assertFalse($v->validate());
     }
+    
+    public function testBooleanValid()
+    {
+        $v = new Validator(array('test' => true));
+        $v->rule('boolean', 'test');
+        $this->assertTrue($v->validate());
+    }
+
+    public function testBooleanInvalid()
+    {
+        $v = new Validator(array('test' => 'true'));
+        $v->rule('boolean', 'test');
+        $this->assertFalse($v->validate());
+    }
 }
 
 function sampleFunctionCallback($field, $value, array $params) {