diff --git a/dibi/drivers/DibiPdoDriver.php b/dibi/drivers/DibiPdoDriver.php
index e0bc6d63..f049c011 100644
--- a/dibi/drivers/DibiPdoDriver.php
+++ b/dibi/drivers/DibiPdoDriver.php
@@ -318,8 +318,9 @@ class DibiPdoDriver extends DibiObject implements IDibiDriver, IDibiResultDriver
 				return ($pos <= 0 ? "'%" : "'") . $value . ($pos >= 0 ? "%'" : "'");
 
 			case 'pgsql':
+				$bs = substr($this->connection->quote('\\', PDO::PARAM_STR), 1, -1); // standard_conforming_strings = on/off
 				$value = substr($this->connection->quote($value, PDO::PARAM_STR), 1, -1);
-				$value = strtr($value, array( '%' => '\\\\%', '_' => '\\\\_'));
+				$value = strtr($value, array('%' => $bs . '%', '_' => $bs . '_', '\\' => '\\\\'));
 				return ($pos <= 0 ? "'%" : "'") . $value . ($pos >= 0 ? "%'" : "'");
 
 			case 'sqlite':
diff --git a/dibi/drivers/DibiPostgreDriver.php b/dibi/drivers/DibiPostgreDriver.php
index 915f1f73..90eccfa5 100644
--- a/dibi/drivers/DibiPostgreDriver.php
+++ b/dibi/drivers/DibiPostgreDriver.php
@@ -310,8 +310,9 @@ class DibiPostgreDriver extends DibiObject implements IDibiDriver, IDibiResultDr
 	 */
 	public function escapeLike($value, $pos)
 	{
+		$bs = pg_escape_string($this->connection, '\\'); // standard_conforming_strings = on/off
 		$value = pg_escape_string($this->connection, $value);
-		$value = strtr($value, array( '%' => '\\\\%', '_' => '\\\\_'));
+		$value = strtr($value, array('%' => $bs . '%', '_' => $bs . '_', '\\' => '\\\\'));
 		return ($pos <= 0 ? "'%" : "'") . $value . ($pos >= 0 ? "%'" : "'");
 	}
 
diff --git a/tests/dibi/DibiTranslator.phpt b/tests/dibi/DibiTranslator.phpt
index fce89076..659c55db 100644
--- a/tests/dibi/DibiTranslator.phpt
+++ b/tests/dibi/DibiTranslator.phpt
@@ -198,15 +198,36 @@ Assert::same(
 
 
 // like
-if ($config['driver'] !== 'sqlite') { // sqlite2
+$args = array(
+	"SELECT * FROM products WHERE (title LIKE %like~ AND title LIKE %~like) OR title LIKE %~like~",
+	'C',
+	'r',
+	"a\n%_\\'\""
+);
+
+if ($config['system'] === 'pgsql') {
+	$conn->query('SET escape_string_warning = off'); // do not log warnings
+
+	$conn->query('SET standard_conforming_strings = off');
+	Assert::same(
+		"SELECT * FROM products WHERE (title LIKE 'C%' AND title LIKE '%r') OR title LIKE '%a\n\\\\%\\\\_\\\\\\\\''\"%'",
+		$conn->translate($args[0], $args[1], $args[2], $args[3])
+	);
+
+	$conn->query('SET standard_conforming_strings = on');
+	Assert::same(
+		"SELECT * FROM products WHERE (title LIKE 'C%' AND title LIKE '%r') OR title LIKE '%a\n\\%\\_\\\\''\"%'",
+		$conn->translate($args[0], $args[1], $args[2], $args[3])
+	);
+
+} elseif ($config['driver'] !== 'sqlite') { // sqlite2
 	Assert::same(
 		reformat(array(
 			'sqlite' => "SELECT * FROM products WHERE (title LIKE 'C%' ESCAPE '\\' AND title LIKE '%r' ESCAPE '\\') OR title LIKE '%a\n\\%\\_\\\\''\"%' ESCAPE '\\'",
 			'odbc' => "SELECT * FROM products WHERE (title LIKE 'C%' AND title LIKE '%r') OR title LIKE '%a\n[%][_]\\''\"%'",
-			'pgsql' => "SELECT * FROM products WHERE (title LIKE 'C%' AND title LIKE '%r') OR title LIKE '%a\n\\\\%\\\\_\\''\"%'",
 			"SELECT * FROM products WHERE (title LIKE 'C%' AND title LIKE '%r') OR title LIKE '%a\\n\\%\\_\\\\\\\\\'\"%'",
 		)),
-		$conn->translate("SELECT * FROM products WHERE (title LIKE %like~ AND title LIKE %~like) OR title LIKE %~like~", 'C', 'r', "a\n%_\\'\"")
+		$conn->translate($args[0], $args[1], $args[2], $args[3])
 	);
 }