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-rw-r--r--sys/src/9/pc64/mem.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/src/9/pc64/mem.h b/sys/src/9/pc64/mem.h
index 9ec07363a..acbbff43d 100644
--- a/sys/src/9/pc64/mem.h
+++ b/sys/src/9/pc64/mem.h
@@ -36,7 +36,7 @@
* Time
*/
#define HZ (100) /* clock frequency */
-#define MS2HZ (100/HZ) /* millisec per clock tick */
+#define MS2HZ (1000/HZ) /* millisec per clock tick */
#define TK2SEC(t) ((t)/HZ) /* ticks to seconds */
/*