diff --git a/packages/backend/src/server/api/endpoints/drive/files/create.ts b/packages/backend/src/server/api/endpoints/drive/files/create.ts
index 11c255a361..7d5c0ccd4d 100644
--- a/packages/backend/src/server/api/endpoints/drive/files/create.ts
+++ b/packages/backend/src/server/api/endpoints/drive/files/create.ts
@@ -63,6 +63,12 @@ export const meta = {
 			id: 'b9d8c348-33f0-4673-b9a9-5d4da058977a',
 			httpStatusCode: 413,
 		},
+
+		unallowedFileType: {
+			message: 'Cannot upload the file because it is an unallowed file type.',
+			code: 'UNALLOWED_FILE_TYPE',
+			id: '4becd248-7f2c-48c4-a9f0-75edc4f9a1ea',
+		},
 	},
 } as const;
 
@@ -123,6 +129,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 					if (err.id === '282f77bf-5816-4f72-9264-aa14d8261a21') throw new ApiError(meta.errors.inappropriate);
 					if (err.id === 'c6244ed2-a39a-4e1c-bf93-f0fbd7764fa6') throw new ApiError(meta.errors.noFreeSpace);
 					if (err.id === 'f9e4e5f3-4df4-40b5-b400-f236945f7073') throw new ApiError(meta.errors.maxFileSizeExceeded);
+					if (err.id === 'bd71c601-f9b0-4808-9137-a330647ced9b') throw new ApiError(meta.errors.unallowedFileType);
 				}
 				throw new ApiError();
 			} finally {