diff --git a/src/services/upload/readFileService.ts b/src/services/upload/readFileService.ts
index 5ced23843..3342fd572 100644
--- a/src/services/upload/readFileService.ts
+++ b/src/services/upload/readFileService.ts
@@ -58,7 +58,7 @@ export async function getFileType(
         logError(e, CustomError.TYPE_DETECTION_FAILED, {
             fileFormat,
         });
-        return { fileType: FILE_TYPE.OTHERS, exactType: null };
+        return { fileType: FILE_TYPE.OTHERS, exactType: fileFormat };
     }
 }
 
diff --git a/src/services/upload/uploader.ts b/src/services/upload/uploader.ts
index 8259e2117..aef8bd962 100644
--- a/src/services/upload/uploader.ts
+++ b/src/services/upload/uploader.ts
@@ -102,9 +102,9 @@ export default async function uploader(
             file: decryptedFile,
         };
     } catch (e) {
-        const fileFormat =
-            fileTypeInfo.exactType ?? rawFile.name.split('.').pop();
-        logError(e, 'file upload failed', { fileFormat });
+        logError(e, 'file upload failed', {
+            fileFormat: fileTypeInfo.exactType,
+        });
         const error = handleUploadError(e);
         switch (error.message) {
             case CustomError.ETAG_MISSING: