diff --git a/docs/cmdline-opts/tls-earlydata.md b/docs/cmdline-opts/tls-earlydata.md
index 01b7b9176d..6428977983 100644
--- a/docs/cmdline-opts/tls-earlydata.md
+++ b/docs/cmdline-opts/tls-earlydata.md
@@ -20,7 +20,8 @@ Example:
 Enable the use of TLSv1.3 early data, also known as '0RTT' where possible.
 This has security implications for the requests sent that way.
 
-This option is used when curl is built to use GnuTLS.
+This option can be used when curl is built to use GnuTLS, wolfSSL, quictls and
+OpenSSL as a TLS provider (but not BoringSSL, AWS-LC, or rustls).
 
 If a server supports this TLSv1.3 feature, and to what extent, is announced
 as part of the TLS "session" sent back to curl. Until curl has seen such