diff --git a/kernel/umount_manager.c b/kernel/umount_manager.c
index a3c3ac74..b6465ea0 100644
--- a/kernel/umount_manager.c
+++ b/kernel/umount_manager.c
@@ -109,6 +109,9 @@ int ksu_umount_manager_add(const char *path, bool check_mnt, int flags, bool is_
     unsigned long irqflags;
     int ret = 0;
 
+    if (flags == -1)
+        flags = MNT_DETACH;
+
     if (!path || strlen(path) == 0 || strlen(path) >= 256) {
         return -EINVAL;
     }
diff --git a/userspace/ksud/src/cli.rs b/userspace/ksud/src/cli.rs
index ce67a6cb..b88aa4f3 100644
--- a/userspace/ksud/src/cli.rs
+++ b/userspace/ksud/src/cli.rs
@@ -361,7 +361,7 @@ enum Umount {
         check_mnt: bool,
 
         /// Umount flags (0 or 8 for MNT_DETACH)
-        #[arg(long, default_value = "0")]
+        #[arg(long, default_value = "-1")]
         flags: i32,
     },
 
diff --git a/userspace/ksud/src/umount_manager.rs b/userspace/ksud/src/umount_manager.rs
index e30a76cf..5f9627e4 100644
--- a/userspace/ksud/src/umount_manager.rs
+++ b/userspace/ksud/src/umount_manager.rs
@@ -87,7 +87,11 @@ impl UmountManager {
     }
 
     pub fn add_entry(&mut self, path: &str, check_mnt: bool, flags: i32) -> Result<()> {
-        let exists = self.defaults.iter().chain(&self.config.entries).any(|e| e.path == path);
+        let exists = self
+            .defaults
+            .iter()
+            .chain(&self.config.entries)
+            .any(|e| e.path == path);
         if exists {
             return Err(anyhow!("Entry already exists: {}", path));
         }
@@ -166,7 +170,7 @@ impl UmountManager {
             UmountEntry {
                 path: "/data/adb/modules".to_string(),
                 check_mnt: false,
-                flags: 0x00000002, // MNT_DETACH
+                flags: -1,
                 is_default: true,
             },
         ]