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-rw-r--r--hwclock/clock.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/hwclock/clock.h b/hwclock/clock.h
index 6e8a9b4ca..cbdf99917 100644
--- a/hwclock/clock.h
+++ b/hwclock/clock.h
@@ -33,6 +33,7 @@ extern void outsyserr(char *msg, ...)
#else
;
#endif
+extern double time_diff(struct timeval subtrahend, struct timeval subtractor);
/* cmos.c */
extern void set_cmos_epoch(int ARCconsole, int SRM);
extern void set_cmos_access(int Jensen, int funky_toy);