diff --git a/src/NotEmpty.php b/src/NotEmpty.php
index 54456f280..ee6293550 100644
--- a/src/NotEmpty.php
+++ b/src/NotEmpty.php
@@ -90,7 +90,7 @@ public function __construct($options = null)
                 $detected = 0;
                 $found    = false;
                 foreach ($options as $option) {
-                    if (in_array($option, $this->constants)) {
+                    if (in_array($option, $this->constants, true)) {
                         $found = true;
                         $detected += array_search($option, $this->constants);
                     }
diff --git a/test/NotEmptyTest.php b/test/NotEmptyTest.php
index 44a73acd0..2319d8697 100644
--- a/test/NotEmptyTest.php
+++ b/test/NotEmptyTest.php
@@ -589,6 +589,12 @@ public function testEqualsMessageTemplates()
         $this->assertAttributeEquals($validator->getOption('messageTemplates'),
                                      'messageTemplates', $validator);
     }
+
+    public function testTypeAutoDetectionHasNoSideEffect()
+    {
+        $validator = new NotEmpty(array('translatorEnabled' => true));
+        $this->assertEquals(493, $validator->getType());
+    }
 }
 
 class ClassTest2