diff --git a/lib/Cake/Utility/Validation.php b/lib/Cake/Utility/Validation.php
index f7d27cc9f..95a960ce0 100644
--- a/lib/Cake/Utility/Validation.php
+++ b/lib/Cake/Utility/Validation.php
@@ -478,7 +478,7 @@ class Validation {
 			if (function_exists('checkdnsrr') && checkdnsrr($regs[1], 'MX')) {
 				return true;
 			}
-			return is_array(gethostbynamel($regs[1]));
+			return is_array(gethostbynamel($regs[1] . '.'));
 		}
 		return false;
 	}