diff --git a/userspace/ksud/src/ksu.rs b/userspace/ksud/src/ksu.rs
index fafe72f8..0235b59a 100644
--- a/userspace/ksud/src/ksu.rs
+++ b/userspace/ksud/src/ksu.rs
@@ -161,11 +161,15 @@ pub fn root_shell() -> Result<()> {
     }
 
     let mut uid = 0; // default uid = 0(root)
-    #[cfg(any(target_os = "linux", target_os = "android"))]
     if free_idx < matches.free.len() {
         let name = &matches.free[free_idx];
         uid = unsafe {
-            match libc::getpwnam(name.as_ptr() as *const u8).as_ref() {
+            #[cfg(target_arch = "aarch64")]
+            let pw = libc::getpwnam(name.as_ptr() as *const u8).as_ref();
+            #[cfg(target_arch = "x86_64")]
+            let pw = libc::getpwnam(name.as_ptr() as *const i8).as_ref();
+
+            match pw {
                 Some(pw) => pw.pw_uid,
                 None => name.parse::<u32>().unwrap_or(0),
             }