diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 5f1bb8e2008fddb3de06ccc9c57eb2dc9fbc11f2..f6117a4c7cb8e97eab31019a23122429a800dbf7 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -652,6 +652,8 @@ int do_adjtimex(struct timex *txc)
 		struct timespec delta;
 		delta.tv_sec  = txc->time.tv_sec;
 		delta.tv_nsec = txc->time.tv_usec;
+		if (!capable(CAP_SYS_TIME))
+			return -EPERM;
 		if (!(txc->modes & ADJ_NANO))
 			delta.tv_nsec *= 1000;
 		result = timekeeping_inject_offset(&delta);