diff --git a/kernel/aster-nix/src/syscall/time.rs b/kernel/aster-nix/src/syscall/time.rs
index dd6e569a2..79df130b9 100644
--- a/kernel/aster-nix/src/syscall/time.rs
+++ b/kernel/aster-nix/src/syscall/time.rs
@@ -6,8 +6,15 @@ use crate::{log_syscall_entry, prelude::*, time::SystemTime, util::write_val_to_
 pub fn sys_time(tloc: Vaddr) -> Result<SyscallReturn> {
     log_syscall_entry!(SYS_TIME);
     debug!("tloc = 0x{tloc:x}");
-    let now = SystemTime::now();
-    let now_as_secs = now.duration_since(&SystemTime::UNIX_EPOCH)?.as_secs();
-    write_val_to_user(tloc, &now_as_secs)?;
-    Ok(SyscallReturn::Return(0))
+
+    let now_as_secs = {
+        let now = SystemTime::now();
+        now.duration_since(&SystemTime::UNIX_EPOCH)?.as_secs()
+    };
+
+    if tloc != 0 {
+        write_val_to_user(tloc, &now_as_secs)?;
+    }
+
+    Ok(SyscallReturn::Return(now_as_secs as _))
 }