diff --git a/runtimes/aleph-debian-12-python/init1.py b/runtimes/aleph-debian-12-python/init1.py
index 9f70bef6..5af37585 100644
--- a/runtimes/aleph-debian-12-python/init1.py
+++ b/runtimes/aleph-debian-12-python/init1.py
@@ -619,6 +619,6 @@ async def handle_instruction(reader, writer):
     # Send reboot syscall, see man page
     # https://man7.org/linux/man-pages/man2/reboot.2.html
     libc = ctypes.CDLL(None)
-    libc.syscall(169, 0xFEE1DEAD, 672274793, 0x4321FEDC, None)
+    libc.syscall(169, 0xFEE1DEAD, 672274793, 0x1234567, None)
     # The exit should not happen due to system halt.
     sys.exit(0)