diff --git a/src/header/semaphore/mod.rs b/src/header/semaphore/mod.rs
index cc16858dbf..ec519abc4b 100644
--- a/src/header/semaphore/mod.rs
+++ b/src/header/semaphore/mod.rs
@@ -159,8 +159,8 @@ pub unsafe extern "C" fn sem_open(
     }
     let (mode, value): (mode_t, c_uint) = if create {
         (
-            unsafe { __valist.next_arg::<mode_t>() }.unwrap_or(0),
-            unsafe { __valist.next_arg::<c_uint>() }.unwrap_or(0),
+            unsafe { __valist.next_arg::<mode_t>() },
+            unsafe { __valist.next_arg::<c_uint>() },
         )
     } else {
         (0, 0)