diff --git a/sbin/adjkerntz/adjkerntz.c b/sbin/adjkerntz/adjkerntz.c
index 40669c206408..bf390107ea95 100644
--- a/sbin/adjkerntz/adjkerntz.c
+++ b/sbin/adjkerntz/adjkerntz.c
@@ -148,6 +148,8 @@ main(int argc, char *argv[])
 			return 0;
 	}
 
+	tzset();
+
 	mib[0] = CTL_MACHDEP;
 	mib[1] = CPU_ADJKERNTZ;
 	len = sizeof(kern_offset);