diff --git a/system/database/drivers/pdo/pdo_result.php b/system/database/drivers/pdo/pdo_result.php
index 322da8d..b45e741 100644
--- a/system/database/drivers/pdo/pdo_result.php
+++ b/system/database/drivers/pdo/pdo_result.php
@@ -56,9 +56,9 @@
 		{
 			return $this->num_rows = count($this->result_object);
 		}
-		elseif (($this->num_rows = $this->result_id->rowCount()) > 0)
+		elseif (($num_rows = $this->result_id->rowCount()) > 0)
 		{
-			return $this->num_rows;
+			return $this->num_rows = $num_rows;
 		}
 
 		return $this->num_rows = count($this->result_array());