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-rw-r--r--kern/time_stamp.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/kern/time_stamp.h b/kern/time_stamp.h
index becaae1b..2492e522 100644
--- a/kern/time_stamp.h
+++ b/kern/time_stamp.h
@@ -52,7 +52,7 @@ struct tsval {
#define TS_FORMAT 1
#if KERNEL
-unsigned ts_tick_count;
+extern unsigned ts_tick_count;
#endif /* KERNEL */
#endif /* TS_FORMAT */