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-rw-r--r--sys/arch/pmax/pmax/clock.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/arch/pmax/pmax/clock.c b/sys/arch/pmax/pmax/clock.c
index 783e688b65d..146afa70d89 100644
--- a/sys/arch/pmax/pmax/clock.c
+++ b/sys/arch/pmax/pmax/clock.c
@@ -84,6 +84,11 @@ volatile struct chiptime *Mach_clock_addr;
#define RATE_1024_HZ 0x6 /* 976.562 us */
#define RATE_2048_HZ 0x5 /* 488.281 usecs/interrupt */
+/* why should this be defined in the config file ? TTTTT */
+#ifndef HZ
+#define HZ 256
+#endif
+
#undef SELECTED_RATE
#if (HZ == 64)
# define SELECTED_RATE RATE_64_HZ /* 4.4bsd default on pmax */