diff --git a/src/Adapter/DbTable/AbstractAdapter.php b/src/Adapter/DbTable/AbstractAdapter.php
index 3e908a2..55212cf 100644
--- a/src/Adapter/DbTable/AbstractAdapter.php
+++ b/src/Adapter/DbTable/AbstractAdapter.php
@@ -348,7 +348,7 @@ protected function authenticateQuerySelect(Sql\Select $dbSelect)
      */
     protected function authenticateValidateResultSet(array $resultIdentities)
     {
-        if (count($resultIdentities) < 1) {
+        if (! $resultIdentities) {
             $this->authenticateResultInfo['code']       = AuthenticationResult::FAILURE_IDENTITY_NOT_FOUND;
             $this->authenticateResultInfo['messages'][] = 'A record with the supplied identity could not be found.';
             return $this->authenticateCreateAuthResult();