diff --git a/core/startos/src/disk/main.rs b/core/startos/src/disk/main.rs
index 73aca4010..af4c6e354 100644
--- a/core/startos/src/disk/main.rs
+++ b/core/startos/src/disk/main.rs
@@ -287,6 +287,7 @@ pub async fn mount_fs<P: AsRef<Path>>(
         Command::new("cryptsetup")
             .arg("-q")
             .arg("luksOpen")
+            .arg("--allow-discards")
             .arg(format!("--key-file={}", PASSWORD_PATH))
             .arg(format!("--keyfile-size={}", password.len()))
             .arg(&blockdev_path)