diff --git a/modules/orm/classes/Kohana/ORM.php b/modules/orm/classes/Kohana/ORM.php
index 341b5b0..450fd4a 100644
--- a/modules/orm/classes/Kohana/ORM.php
+++ b/modules/orm/classes/Kohana/ORM.php
@@ -812,7 +812,7 @@ class Kohana_ORM extends Model implements serializable {
 
 			// If the replacement value is the same as the original value, we dont need to update.
 			// @note This assumes that the value returned from the DB is always a string.
-			if (array_key_exists($column, $this->_original_values) AND (string)$value === $this->_original_values[$column] AND array_key_exists($column, $this->_changed))
+			if (array_key_exists($column, $this->_original_values) AND is_string($value) AND (string)$value === $this->_original_values[$column] AND array_key_exists($column, $this->_changed))
 			{
 				unset($this->_changed[$column]);