diff --git a/src/shared/clock-util.h b/src/shared/clock-util.h
index 3f1ae7abfc..9e96d50d96 100644
--- a/src/shared/clock-util.h
+++ b/src/shared/clock-util.h
@@ -4,7 +4,7 @@
 #include <time.h>
 
 int clock_is_localtime(const char* adjtime_path);
-int clock_set_timezone(int *min);
+int clock_set_timezone(int *ret_minutesdelta);
 int clock_reset_timewarp(void);
 int clock_get_hwclock(struct tm *tm);
 int clock_set_hwclock(const struct tm *tm);