diff --git a/src/com/owncloud/android/lib/resources/files/ChunkedUploadRemoteFileOperation.java b/src/com/owncloud/android/lib/resources/files/ChunkedUploadRemoteFileOperation.java
index 62afed086..764f9aa55 100644
--- a/src/com/owncloud/android/lib/resources/files/ChunkedUploadRemoteFileOperation.java
+++ b/src/com/owncloud/android/lib/resources/files/ChunkedUploadRemoteFileOperation.java
@@ -71,7 +71,7 @@ protected int uploadFile(OwnCloudClient client) throws IOException {
 
         File file = new File(mLocalPath);
         SharedPreferences sharedPref = mContext.getApplicationContext().getSharedPreferences("com.nextcloud.PREFERENCE_upload", Context.MODE_PRIVATE);
-        String chunkId = String.valueOf(Math.abs(file.getName().hashCode())).substring(0,8);
+        String chunkId = String.format("%08d", Math.abs(file.getName().hashCode()));
         Set<String> successfulChunks = sharedPref.getStringSet(chunkId, new LinkedHashSet<String>());
 
         try {