diff --git a/src/modules/sym.txt b/src/modules/sym.txt
index a3ab0b2..ddc2a2b 100644
--- a/src/modules/sym.txt
+++ b/src/modules/sym.txt
@@ -1022,6 +1022,7 @@ eta η
 gamma γ
 iota ι
   .inv ℩
+@deprecated: `kai` is deprecated, use ϗ or `\u{3d7}` instead
 kai ϗ
 kappa κ
   .alt ϰ
@@ -1056,6 +1057,7 @@ Epsilon Ε
 Eta Η
 Gamma Γ
 Iota Ι
+@deprecated: `Kai` is deprecated, use Ϗ or `\u{3c5}` instead
 Kai Ϗ
 Kappa Κ
 Lambda Λ