diff --git a/app/src/main/java/us/shandian/giga/get/DownloadRunnableFallback.java b/app/src/main/java/us/shandian/giga/get/DownloadRunnableFallback.java
index eed5db463..1d2483e79 100644
--- a/app/src/main/java/us/shandian/giga/get/DownloadRunnableFallback.java
+++ b/app/src/main/java/us/shandian/giga/get/DownloadRunnableFallback.java
@@ -85,6 +85,7 @@ public class DownloadRunnableFallback extends Thread {
             if (mMission.unknownLength || mConn.getResponseCode() == 200) {
                 // restart amount of bytes downloaded
                 mMission.done = mMission.offsets[mMission.current] - mMission.offsets[0];
+                start = 0; // reset position to avoid writing at wrong offset
             }
 
             mF = mMission.storage.getStream();