diff --git a/include/sys/timex.h b/include/sys/timex.h
index f37c13ce..08f4b094 100644
--- a/include/sys/timex.h
+++ b/include/sys/timex.h
@@ -50,6 +50,7 @@ struct timex {
 #define MOD_TIMECONST	ADJ_TIMECONST
 #define MOD_CLKB	ADJ_TICK
 #define MOD_CLKA	ADJ_OFFSET_SINGLESHOT
+#define MOD_TAI		ADJ_TAI
 #define MOD_MICRO	ADJ_MICRO
 #define MOD_NANO	ADJ_NANO
 
@@ -74,7 +75,7 @@ struct timex {
 #define STA_CLK		0x8000
 
 #define STA_RONLY (STA_PPSSIGNAL | STA_PPSJITTER | STA_PPSWANDER | \
-    STA_PPSERROR | STA_CLOCKERR)
+    STA_PPSERROR | STA_CLOCKERR | STA_NANO | STA_MODE | STA_CLK)
 
 #define TIME_OK		0
 #define TIME_INS	1