diff --git a/adb/commandline.cpp b/adb/commandline.cpp
index 056b8c1..30a38e3 100644
--- a/adb/commandline.cpp
+++ b/adb/commandline.cpp
@@ -1265,6 +1265,9 @@
     printf("Now unlock your device and confirm the restore operation.\n");
     copy_to_file(tarFd, fd);
 
+    // Wait until the other side finishes, or it'll get sent SIGHUP.
+    copy_to_file(fd, STDOUT_FILENO);
+
     adb_close(fd);
     adb_close(tarFd);
     return 0;