diff --git a/dibi/drivers/mysql.php b/dibi/drivers/mysql.php
index aabfa4fea..7c991b84f 100644
--- a/dibi/drivers/mysql.php
+++ b/dibi/drivers/mysql.php
@@ -466,7 +466,7 @@ public function getColumns($table)
 				'table' => $table,
 				'nativetype' => strtoupper($type[0]),
 				'size' => isset($type[1]) ? (int) $type[1] : NULL,
-				'unsigned' => (bool) strstr('unsigned', $row['Type']),
+				'unsigned' => (bool) strstr($row['Type'], 'unsigned'),
 				'nullable' => $row['Null'] === 'YES',
 				'default' => $row['Default'],
 				'autoincrement' => $row['Extra'] === 'auto_increment',
diff --git a/dibi/drivers/mysqli.php b/dibi/drivers/mysqli.php
index 67e215da7..f5a2d67d5 100644
--- a/dibi/drivers/mysqli.php
+++ b/dibi/drivers/mysqli.php
@@ -469,7 +469,7 @@ public function getColumns($table)
 				'table' => $table,
 				'nativetype' => strtoupper($type[0]),
 				'size' => isset($type[1]) ? (int) $type[1] : NULL,
-				'unsigned' => (bool) strstr('unsigned', $row['Type']),
+				'unsigned' => (bool) strstr($row['Type'], 'unsigned'),
 				'nullable' => $row['Null'] === 'YES',
 				'default' => $row['Default'],
 				'autoincrement' => $row['Extra'] === 'auto_increment',