diff --git a/src/loaders/sitemap-loader.ts b/src/loaders/sitemap-loader.ts
index 2189511c..f46324c6 100644
--- a/src/loaders/sitemap-loader.ts
+++ b/src/loaders/sitemap-loader.ts
@@ -30,7 +30,7 @@ export class SitemapLoader extends BaseLoader<{ type: 'SitemapLoader' }> {
                         metadata: {
                             ...chunk.metadata,
                             type: <'SitemapLoader'>'SitemapLoader',
-                            source: this.url,
+                            originalSource: this.url,
                             chunkId: i,
                         },
                     };
diff --git a/src/loaders/youtube-channel-loader.ts b/src/loaders/youtube-channel-loader.ts
index 237c7779..4e424921 100644
--- a/src/loaders/youtube-channel-loader.ts
+++ b/src/loaders/youtube-channel-loader.ts
@@ -30,7 +30,7 @@ export class YoutubeChannelLoader extends BaseLoader<{ type: 'YoutubeChannelLoad
                         metadata: {
                             ...chunk.metadata,
                             type: <'YoutubeChannelLoader'>'YoutubeChannelLoader',
-                            source: this.channelId,
+                            originalSource: this.channelId,
                             chunkId: i,
                         },
                     };
diff --git a/src/loaders/youtube-search-loader.ts b/src/loaders/youtube-search-loader.ts
index c579df87..ef6eeec6 100644
--- a/src/loaders/youtube-search-loader.ts
+++ b/src/loaders/youtube-search-loader.ts
@@ -32,7 +32,7 @@ export class YoutubeSearchLoader extends BaseLoader<{ type: 'YoutubeSearchLoader
                         metadata: {
                             ...chunk.metadata,
                             type: <'YoutubeSearchLoader'>'YoutubeSearchLoader',
-                            source: this.searchString,
+                            originalSource: this.searchString,
                             chunkId: i,
                         },
                     };