diff --git a/char-def.lua b/char-def.lua
index 63a0909..3aec401 100644
--- a/char-def.lua
+++ b/char-def.lua
@@ -50145,6 +50145,8 @@ characters.data={
   description="COMBINING THREE DOTS ABOVE",
   direction="nsm",
   linebreak="cm",
+  mathclass="accent",
+  mathname="dddot",
   unicodeslot=0x20DB,
  },
  [0x20DC]={