diff --git a/core/runtime/os_specific_darwin.odin b/core/runtime/os_specific_darwin.odin
index 33136c92f..5de9a7d57 100644
--- a/core/runtime/os_specific_darwin.odin
+++ b/core/runtime/os_specific_darwin.odin
@@ -4,7 +4,7 @@ package runtime
 import "core:intrinsics"
 
 _os_write :: proc "contextless" (data: []byte) -> (int, _OS_Errno) {
-	ret := intrinsics.syscall(4, 1, uintptr(raw_data(data)), uintptr(len(data)))
+	ret := intrinsics.syscall(0x2000004, 1, uintptr(raw_data(data)), uintptr(len(data)))
 	if ret < 0 {
 		return 0, _OS_Errno(-ret)
 	}