diff --git a/cake/libs/model/cake_schema.php b/cake/libs/model/cake_schema.php
index 152d9cd334d..82b2e891361 100644
--- a/cake/libs/model/cake_schema.php
+++ b/cake/libs/model/cake_schema.php
@@ -486,10 +486,13 @@ function compare($old, $new = null) {
 			if (isset($old[$table]['indexes']) && isset($new[$table]['indexes'])) {
 				$diff = $this->_compareIndexes($new[$table]['indexes'], $old[$table]['indexes']);
 				if ($diff) {
-					if (isset($tables[$table]['drop']['indexes']) && isset($diff['drop'])) {
+					if (!isset($tables[$table])) {
+						$tables[$table] = array();
+					}
+					if (isset($diff['drop'])) {
 						$tables[$table]['drop']['indexes'] = $diff['drop'];
 					}
-					if (isset($tables[$table]['add']['indexes']) && isset($diff['add'])) {
+					if ($diff && isset($diff['add'])) {
 						$tables[$table]['add']['indexes'] = $diff['add'];
 					}
 				}