diff --git a/application/data/install/schema.sql b/application/data/install/schema.sql
index 5aeaf9fe0..4a4e1088f 100644
--- a/application/data/install/schema.sql
+++ b/application/data/install/schema.sql
@@ -89,7 +89,7 @@ CREATE TABLE `media` (
   `renderer` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   `data` longtext COLLATE utf8mb4_unicode_ci COMMENT '(DC2Type:json_array)',
   `source` longtext COLLATE utf8mb4_unicode_ci,
-  `media_type` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `media_type` varchar(190) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `storage_id` varchar(190) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `extension` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `sha256` char(64) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
@@ -103,6 +103,7 @@ CREATE TABLE `media` (
   UNIQUE KEY `UNIQ_6A2CA10C5CC5DB90` (`storage_id`),
   KEY `IDX_6A2CA10C126F525E` (`item_id`),
   KEY `item_position` (`item_id`,`position`),
+  KEY `media_type` (`media_type`),
   CONSTRAINT `FK_6A2CA10C126F525E` FOREIGN KEY (`item_id`) REFERENCES `item` (`id`),
   CONSTRAINT `FK_6A2CA10CBF396750` FOREIGN KEY (`id`) REFERENCES `resource` (`id`) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
diff --git a/application/data/migrations/20240219000000_AddIndexMediaType.php b/application/data/migrations/20240219000000_AddIndexMediaType.php
new file mode 100644
index 000000000..4c4847307
--- /dev/null
+++ b/application/data/migrations/20240219000000_AddIndexMediaType.php
@@ -0,0 +1,19 @@
+<?php declare(strict_types=1);
+
+namespace Omeka\Db\Migrations;
+
+use Doctrine\DBAL\Connection;
+use Omeka\Db\Migration\MigrationInterface;
+
+class AddIndexMediaType implements MigrationInterface
+{
+    public function up(Connection $conn)
+    {
+        try {
+            $conn->executeStatement('ALTER TABLE `media` CHANGE `media_type` `media_type` varchar(190) COLLATE "utf8mb4_unicode_ci" NULL AFTER `source`;');
+            $conn->executeStatement('ALTER TABLE `media` ADD INDEX `media_type` (`media_type`);');
+        } catch (\Exception $e) {
+            // Index exists.
+        }
+    }
+}
diff --git a/application/src/Entity/Media.php b/application/src/Entity/Media.php
index 25ee390c6..090a9eb7b 100644
--- a/application/src/Entity/Media.php
+++ b/application/src/Entity/Media.php
@@ -8,6 +8,10 @@
  *         @Index(
  *             name="item_position",
  *             columns={"item_id", "position"}
+ *         ),
+ *         @Index(
+ *             name="media_type",
+ *             columns={"media_type"}
  *         )
  *     }
  * )
@@ -41,7 +45,7 @@ class Media extends Resource
     protected $source;
 
     /**
-     * @Column(nullable=true)
+     * @Column(nullable=true, length=190)
      */
     protected $mediaType;