diff --git a/wire/modules/Fieldtype/FieldtypeSelector.module b/wire/modules/Fieldtype/FieldtypeSelector.module
index b5b65da4..277afa17 100644
--- a/wire/modules/Fieldtype/FieldtypeSelector.module
+++ b/wire/modules/Fieldtype/FieldtypeSelector.module
@@ -73,8 +73,9 @@ class FieldtypeSelector extends Fieldtype {
 	*/
 	public function getDatabaseSchema(Field $field) {
 		$schema = parent::getDatabaseSchema($field);
+		$len = $this->wire('database')->getMaxIndexLength();
 		$schema['data'] = 'text NOT NULL';
-		$schema['keys']['data_exact'] = 'KEY `data_exact` (`data`(250))';
+		$schema['keys']['data_exact'] = "KEY `data_exact` (`data`($len))";
 		$schema['keys']['data'] = 'FULLTEXT KEY `data` (`data`)';
 		return $schema;
 	}
diff --git a/wire/modules/Fieldtype/FieldtypeText.module b/wire/modules/Fieldtype/FieldtypeText.module
index 7386bb21..01f104f7 100644
--- a/wire/modules/Fieldtype/FieldtypeText.module
+++ b/wire/modules/Fieldtype/FieldtypeText.module
@@ -141,9 +141,10 @@ class FieldtypeText extends Fieldtype {
 	 *
 	 */
 	public function getDatabaseSchema(Field $field) {
-		$schema = parent::getDatabaseSchema($field); 
+		$schema = parent::getDatabaseSchema($field);
+		$len = $this->wire('database')->getMaxIndexLength();
 		$schema['data'] = 'text NOT NULL';
-		$schema['keys']['data_exact'] = 'KEY `data_exact` (`data`(250))'; 
+		$schema['keys']['data_exact'] = "KEY `data_exact` (`data`($len))"; 
 		$schema['keys']['data'] = 'FULLTEXT KEY `data` (`data`)'; 
 		return $schema;
 	}