diff --git a/gramjs/client/downloads.ts b/gramjs/client/downloads.ts
index 63c07de0..3e10bc16 100644
--- a/gramjs/client/downloads.ts
+++ b/gramjs/client/downloads.ts
@@ -430,13 +430,13 @@ export async function downloadFileV2(
             msgData: msgData,
         })) {
             await writer.write(chunk);
+            downloaded = downloaded.add(chunk.length);
             if (progressCallback) {
                 await progressCallback(
                     downloaded,
                     bigInt(fileSize || bigInt.zero)
                 );
             }
-            downloaded = downloaded.add(chunk.length);
         }
         return returnWriterValue(writer);
     } finally {
diff --git a/gramjs/define.d.ts b/gramjs/define.d.ts
index fad04ce1..5b00886f 100644
--- a/gramjs/define.d.ts
+++ b/gramjs/define.d.ts
@@ -64,8 +64,8 @@ type OutFile =
     | WriteStream
     | { write: Function; close?: Function };
 type ProgressCallback = (
-    total: bigInt.BigInteger,
-    downloaded: bigInt.BigInteger
+    downloaded: bigInt.BigInteger,
+    total: bigInt.BigInteger
 ) => void;
 type ButtonLike = Api.TypeKeyboardButton | Button;