diff --git a/Cake/Database/Query.php b/Cake/Database/Query.php
index <HASH>..<HASH> 100644
--- a/Cake/Database/Query.php
+++ b/Cake/Database/Query.php
@@ -515,7 +515,7 @@ class Query implements ExpressionInterface, IteratorAggregate {
 		$parts = $this->_stringifyExpressions($parts, $generator);
 		foreach ($parts as $k => $p) {
 			if (!is_numeric($k)) {
-				$p = $p . ' AS ' . $k;
+				$p = $p . ' AS ' . $driver->quoteIdentifier($k);
 			}
 			$normalized[] = $p;
 		}
Reverted change done for quoting identifiers