diff --git a/sysdeps/mach/hurd/kernel-posix-cpu-timers.h b/sysdeps/mach/hurd/kernel-posix-cpu-timers.h
new file mode 100644
index 0000000..86a568f
--- /dev/null
+++ b/sysdeps/mach/hurd/kernel-posix-cpu-timers.h
@@ -0,0 +1,4 @@
+/* Parameters for the Hurd ABI for CPU clocks.  */
+
+#define CPUCLOCK_WHICH(clock)	((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK)
+#define CPUCLOCK_CLOCK_MASK	3