diff --git a/server/lib/indexers/channel-indexer.ts b/server/lib/indexers/channel-indexer.ts
index 501ff11..689f400 100644
--- a/server/lib/indexers/channel-indexer.ts
+++ b/server/lib/indexers/channel-indexer.ts
@@ -1,7 +1,7 @@
 import { logger } from '../../helpers/logger'
 import { CONFIG } from '../../initializers/constants'
 import { DBChannel, IndexableChannel } from '../../types/channel.model'
-import { formatChannelForDB } from '../elastic-search/elastic-search-channels'
+import { buildChannelsMapping, formatChannelForDB } from '../elastic-search/elastic-search-channels'
 import { getChannel } from '../requests/peertube-instance'
 import { AbstractIndexer } from './shared'
 
@@ -24,4 +24,8 @@ export class ChannelIndexer extends AbstractIndexer <IndexableChannel, DBChannel
 
     return this.indexElements([ channel ], true)
   }
+
+  buildMapping () {
+    return buildChannelsMapping()
+  }
 }
diff --git a/server/lib/indexers/playlist-indexer.ts b/server/lib/indexers/playlist-indexer.ts
index d63b19e..0b7dcad 100644
--- a/server/lib/indexers/playlist-indexer.ts
+++ b/server/lib/indexers/playlist-indexer.ts
@@ -1,6 +1,6 @@
 import { CONFIG } from '../../initializers/constants'
 import { DBPlaylist, IndexablePlaylist } from '../../types/playlist.model'
-import { formatPlaylistForDB } from '../elastic-search/elastic-search-playlists'
+import { buildPlaylistsMapping, formatPlaylistForDB } from '../elastic-search/elastic-search-playlists'
 import { AbstractIndexer } from './shared'
 
 export class PlaylistIndexer extends AbstractIndexer <IndexablePlaylist, DBPlaylist> {
@@ -13,4 +13,8 @@ export class PlaylistIndexer extends AbstractIndexer <IndexablePlaylist, DBPlayl
     // We don't need to index a specific element yet, since we have all playlist information in the list endpoint
     throw new Error('Not implemented')
   }
+
+  buildMapping () {
+    return buildPlaylistsMapping()
+  }
 }
diff --git a/server/lib/indexers/shared/abstract-indexer.ts b/server/lib/indexers/shared/abstract-indexer.ts
index 5e3db74..3176f98 100644
--- a/server/lib/indexers/shared/abstract-indexer.ts
+++ b/server/lib/indexers/shared/abstract-indexer.ts
@@ -14,6 +14,7 @@ export abstract class AbstractIndexer <T extends IndexableDoc, DB> {
   protected readonly indexQueue: AsyncQueue<QueueParam>
 
   abstract indexSpecificElement (host: string, uuid: string): Promise<any>
+  abstract buildMapping (): object
 
   constructor (
     protected readonly indexName: string,
@@ -33,7 +34,7 @@ export abstract class AbstractIndexer <T extends IndexableDoc, DB> {
   }
 
   initIndex () {
-    return buildIndex(this.indexName, buildVideosMapping())
+    return buildIndex(this.indexName, this.buildMapping())
   }
 
   scheduleIndexation (host: string, identifier: string) {
diff --git a/server/lib/indexers/video-indexer.ts b/server/lib/indexers/video-indexer.ts
index 4002fb7..42e0f3a 100644
--- a/server/lib/indexers/video-indexer.ts
+++ b/server/lib/indexers/video-indexer.ts
@@ -1,7 +1,7 @@
 import { logger } from '../../helpers/logger'
 import { CONFIG } from '../../initializers/constants'
 import { DBVideo, IndexableVideo } from '../../types/video.model'
-import { formatVideoForDB } from '../elastic-search/elastic-search-videos'
+import { buildVideosMapping, formatVideoForDB } from '../elastic-search/elastic-search-videos'
 import { getVideo } from '../requests/peertube-instance'
 import { AbstractIndexer } from './shared'
 
@@ -18,4 +18,8 @@ export class VideoIndexer extends AbstractIndexer <IndexableVideo, DBVideo> {
 
     return this.indexElements([ video ], true)
   }
+
+  buildMapping () {
+    return buildVideosMapping()
+  }
 }