diff --git a/src/main.rs b/src/main.rs
index d68bd81..b16cb1d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -529,7 +529,7 @@ fn exec(cmd: &str) {
     // Safety: libc::daemon() is async-signal-safe
     unsafe {
         proc.pre_exec(|| match libc::daemon(1, 0) {
-            -1 => Err(io::Error::other("Failed to detach new process")),
+            -1 => Err(io::Error::last_os_error()),
             _ => Ok(()),
         });
     }