diff --git a/Sdext.adoc b/Sdext.adoc
index 8bb18296..7526a250 100644
--- a/Sdext.adoc
+++ b/Sdext.adoc
@@ -192,6 +192,9 @@ When a hart resumes:
 . The current privilege mode and virtualization mode are changed to that
 specified by {dcsr-prv} and {dcsr-v}.
 . If the new privilege mode is less privileged than M-mode, `MPRV` in `mstatus` is cleared.
+. If the Smdbltrp extension is implemented and the new privilege mode is not M, then the
+  `MDT` bit is set to 0. If it is U, VS, or VU, then `sstatus.SDT` is also set to 0.
+  Additionally, if it is VU, then `vsstatus.SDT` is also set to 0.
 . The hart is no longer in debug mode.
 
 [[debreg]]