diff --git a/src/Dibi/Fluent.php b/src/Dibi/Fluent.php
index a491d581..d6f48417 100644
--- a/src/Dibi/Fluent.php
+++ b/src/Dibi/Fluent.php
@@ -181,7 +181,7 @@ class Fluent implements IDataSource
 				return $this;
 
 			} elseif (is_string($arg) && preg_match('#^[a-z:_][a-z0-9_.:]*\z#i', $arg)) { // identifier
-				$args = ['%n', $arg];
+				$args = [$clause === 'AS' ? '%N' : '%n', $arg];
 
 			} elseif (is_array($arg) || ($arg instanceof \Traversable && !$arg instanceof self)) { // any array
 				if (isset(self::$modifiers[$clause])) {
diff --git a/src/Dibi/Translator.php b/src/Dibi/Translator.php
index 4986fe6c..3ea61163 100644
--- a/src/Dibi/Translator.php
+++ b/src/Dibi/Translator.php
@@ -225,7 +225,7 @@ final class Translator
 				case 'n':  // key, key, ... identifier names
 					foreach ($value as $k => $v) {
 						if (is_string($k)) {
-							$vx[] = $this->identifiers->$k . (empty($v) ? '' : ' AS ' . $this->identifiers->$v);
+							$vx[] = $this->identifiers->$k . (empty($v) ? '' : ' AS ' . $this->driver->escapeIdentifier($v));
 						} else {
 							$pair = explode('%', $v, 2); // split into identifier & modifier
 							$vx[] = $this->identifiers->{$pair[0]};
diff --git a/tests/dibi/Fluent.select.phpt b/tests/dibi/Fluent.select.phpt
index 0d957962..45a85eca 100644
--- a/tests/dibi/Fluent.select.phpt
+++ b/tests/dibi/Fluent.select.phpt
@@ -26,19 +26,19 @@ Assert::same(
 	(string) $fluent
 );
 
-$fluent->from('table')->as('tableAlias')
+$fluent->from('table')->as('table.Alias')
 	->innerJoin('table1')->on('table.col = table1.col')
 	->innerJoin('table2')->on('table.col = table2.col');
 
 Assert::same(
-	reformat('SELECT * , [a] , [b] AS [bAlias] , [c], [d], [e] , [d] FROM [table] AS [tableAlias] INNER JOIN [table1] ON table.col = table1.col INNER JOIN [table2] ON table.col = table2.col'),
+	reformat('SELECT * , [a] , [b] AS [bAlias] , [c], [d], [e] , [d] FROM [table] AS [table.Alias] INNER JOIN [table1] ON table.col = table1.col INNER JOIN [table2] ON table.col = table2.col'),
 	(string) $fluent
 );
 
 $fluent->from('anotherTable');
 
 Assert::same(
-	reformat('SELECT * , [a] , [b] AS [bAlias] , [c], [d], [e] , [d] FROM [table] AS [tableAlias] INNER JOIN [table1] ON table.col = table1.col INNER JOIN [table2] ON table.col = table2.col , [anotherTable]'),
+	reformat('SELECT * , [a] , [b] AS [bAlias] , [c], [d], [e] , [d] FROM [table] AS [table.Alias] INNER JOIN [table1] ON table.col = table1.col INNER JOIN [table2] ON table.col = table2.col , [anotherTable]'),
 	(string) $fluent
 );
 
diff --git a/tests/dibi/Translator.phpt b/tests/dibi/Translator.phpt
index c616a5c5..5f760125 100644
--- a/tests/dibi/Translator.phpt
+++ b/tests/dibi/Translator.phpt
@@ -280,7 +280,7 @@ $array2 = ['one', 'two', 'three'];
 $array3 = [
 	'col1' => 'one',
 	'col2' => 'two',
-	'col3' => 'three',
+	'col3' => 'thr.ee',
 ];
 $array4 = [
 	'a' => 12,
@@ -301,8 +301,8 @@ WHERE (`test`.`a` LIKE '1995-03-01'
 	OR `b2` IN ('1', '2', '3' )
 	OR `b3` IN ( )
 	OR `b4` IN ( 'one', 'two', 'three' )
-	OR `b5` IN (`col1` AS `one`, `col2` AS `two`, `col3` AS `three` )
-	OR `b6` IN ('one', 'two', 'three')
+	OR `b5` IN (`col1` AS `one`, `col2` AS `two`, `col3` AS `thr.ee` )
+	OR `b6` IN ('one', 'two', 'thr.ee')
 	OR `b7` IN (NULL)
 	OR `b8` IN (RAND() `col1` > `col2` )
 	OR `b9` IN (RAND(), [col1] > [col2] )
@@ -322,8 +322,8 @@ WHERE ("test"."a" LIKE \'1995-03-01\'
 	OR "b2" IN (\'1\', \'2\', \'3\' )
 	OR "b3" IN ( )
 	OR "b4" IN ( \'one\', \'two\', \'three\' )
-	OR "b5" IN ("col1" AS "one", "col2" AS "two", "col3" AS "three" )
-	OR "b6" IN (\'one\', \'two\', \'three\')
+	OR "b5" IN ("col1" AS "one", "col2" AS "two", "col3" AS "thr.ee" )
+	OR "b6" IN (\'one\', \'two\', \'thr.ee\')
 	OR "b7" IN (NULL)
 	OR "b8" IN (RAND() "col1" > "col2" )
 	OR "b9" IN (RAND(), [col1] > [col2] )
@@ -343,8 +343,8 @@ WHERE ([test].[a] LIKE #03/01/1995#
 	OR [b2] IN ('1', '2', '3' )
 	OR [b3] IN ( )
 	OR [b4] IN ( 'one', 'two', 'three' )
-	OR [b5] IN ([col1] AS [one], [col2] AS [two], [col3] AS [three] )
-	OR [b6] IN ('one', 'two', 'three')
+	OR [b5] IN ([col1] AS [one], [col2] AS [two], [col3] AS [thr.ee] )
+	OR [b6] IN ('one', 'two', 'thr.ee')
 	OR [b7] IN (NULL)
 	OR [b8] IN (RAND() [col1] > [col2] )
 	OR [b9] IN (RAND(), [col1] > [col2] )
@@ -364,8 +364,8 @@ WHERE ([test].[a] LIKE '1995-03-01'
 	OR [b2] IN ('1', '2', '3' )
 	OR [b3] IN ( )
 	OR [b4] IN ( 'one', 'two', 'three' )
-	OR [b5] IN ([col1] AS [one], [col2] AS [two], [col3] AS [three] )
-	OR [b6] IN ('one', 'two', 'three')
+	OR [b5] IN ([col1] AS [one], [col2] AS [two], [col3] AS [thr.ee] )
+	OR [b6] IN ('one', 'two', 'thr.ee')
 	OR [b7] IN (NULL)
 	OR [b8] IN (RAND() [col1] > [col2] )
 	OR [b9] IN (RAND(), [col1] > [col2] )