diff --git a/services/collector/src/dto/track-view.dto.ts b/services/collector/src/dto/track-view.dto.ts
index ebd1d8f..62a37cb 100644
--- a/services/collector/src/dto/track-view.dto.ts
+++ b/services/collector/src/dto/track-view.dto.ts
@@ -56,6 +56,11 @@ export class TrackViewDto {
   @IsString()
   sessionId!: string;
 
+  @ApiProperty({ description: 'Original domain the visitor used to reach the site', required: false })
+  @IsOptional()
+  @IsString()
+  domain?: string;
+
   @ApiProperty({ description: 'Additional metadata', required: false })
   @IsOptional()
   @IsObject()