diff --git a/fastboot/fs.cpp b/fastboot/fs.cpp
index f3c000e..6058b88 100644
--- a/fastboot/fs.cpp
+++ b/fastboot/fs.cpp
@@ -91,6 +91,8 @@
     }
     mke2fs_args.push_back("-E");
     mke2fs_args.push_back(ext_attr.c_str());
+    mke2fs_args.push_back("-O");
+    mke2fs_args.push_back("uninit_bg");
     mke2fs_args.push_back(fileName);
 
     std::string size_str = std::to_string(partSize / block_size);