diff --git a/docs/providers/cryptokit.md b/docs/providers/cryptokit.md
index 61ba9d2d..38abdda1 100644
--- a/docs/providers/cryptokit.md
+++ b/docs/providers/cryptokit.md
@@ -8,6 +8,7 @@ For supported targets and algorithms, please consult [Supported primitives secti
 
 * KeyFormat: doesn't support `JWK` key format yet
 * AES.GCM supports only a default tag size of 96 bits
+* EdDSA/XDH: supports only Ed25519 and X25519
 
 ## Example