diff --git a/open-api/immich-openapi-specs.json b/open-api/immich-openapi-specs.json
index 7fecc8a647..8eb172c1fb 100644
--- a/open-api/immich-openapi-specs.json
+++ b/open-api/immich-openapi-specs.json
@@ -4214,6 +4214,13 @@
             "name": "size",
             "required": false,
             "in": "query",
+            "x-immich-history": [
+              {
+                "version": "v3",
+                "state": "Updated",
+                "description": "Specifying 'original' is deprecated. Use the original endpoint directly instead"
+              }
+            ],
             "schema": {
               "$ref": "#/components/schemas/AssetMediaSize"
             }
diff --git a/server/src/controllers/asset-media.controller.spec.ts b/server/src/controllers/asset-media.controller.spec.ts
index 0bfb423898..71206c3855 100644
--- a/server/src/controllers/asset-media.controller.spec.ts
+++ b/server/src/controllers/asset-media.controller.spec.ts
@@ -166,11 +166,16 @@ describe(AssetMediaController.name, () => {
     });
 
     // TODO figure out how to deal with `sendFile`
-    describe.skip('GET /assets/:id/thumbnail', () => {
-      it('should be an authenticated route', async () => {
+    describe('GET /assets/:id/thumbnail', () => {
+      it.skip('should be an authenticated route', async () => {
         await request(ctx.getHttpServer()).get(`/assets/${factory.uuid()}/thumbnail`);
         expect(ctx.authenticate).toHaveBeenCalled();
       });
+
+      it('should redirect if size=original is requested', async () => {
+        const { status } = await request(ctx.getHttpServer()).get(`/assets/${factory.uuid()}/thumbnail?size=original`);
+        expect(status).toBe(302);
+      });
     });
   });
 });
diff --git a/server/src/controllers/asset-media.controller.ts b/server/src/controllers/asset-media.controller.ts
index c1ef8c853d..dbb906fd02 100644
--- a/server/src/controllers/asset-media.controller.ts
+++ b/server/src/controllers/asset-media.controller.ts
@@ -126,6 +126,16 @@ export class AssetMediaController {
     @Res() res: Response,
     @Next() next: NextFunction,
   ) {
+    if (dto.size === AssetMediaSize.Original) {
+      this.logger.deprecate(
+        'Calling the thumbnail endpoint with size=original is deprecated. Use the :id/original endpoint instead',
+      );
+      const [_, reqSearch] = req.url.split('?');
+      const redirSearchParams = new URLSearchParams(reqSearch);
+      redirSearchParams.delete('size');
+      return res.redirect('original' + '?' + redirSearchParams.toString());
+    }
+
     const viewThumbnailRes = await this.service.viewThumbnail(auth, id, dto);
 
     if (viewThumbnailRes instanceof ImmichFileResponse) {
diff --git a/server/src/dtos/asset-media.dto.ts b/server/src/dtos/asset-media.dto.ts
index bb1d3826bb..7178d4184e 100644
--- a/server/src/dtos/asset-media.dto.ts
+++ b/server/src/dtos/asset-media.dto.ts
@@ -1,4 +1,5 @@
 import { createZodDto } from 'nestjs-zod';
+import { HistoryBuilder } from 'src/decorators';
 import { AssetMetadataUpsertItemSchema } from 'src/dtos/asset.dto';
 import { AssetVisibilitySchema } from 'src/enum';
 import { isoDatetimeToDate, JsonParsed, stringToBool } from 'src/validation';
@@ -19,7 +20,11 @@ const AssetMediaSizeSchema = z.enum(AssetMediaSize).describe('Asset media size')
 
 const AssetMediaOptionsSchema = z
   .object({
-    size: AssetMediaSizeSchema.optional(),
+    size: AssetMediaSizeSchema.optional().meta(
+      new HistoryBuilder()
+        .updated('v3', "Specifying 'original' is deprecated. Use the original endpoint directly instead")
+        .getExtensions(),
+    ),
     edited: stringToBool.default(false).optional().describe('Return edited asset if available'),
   })
   .meta({ id: 'AssetMediaOptionsDto' });