diff --git a/sdk/include/psdk/schannel.h b/sdk/include/psdk/schannel.h
index fcdde0d4f00..a6ce4debd7f 100644
--- a/sdk/include/psdk/schannel.h
+++ b/sdk/include/psdk/schannel.h
@@ -32,6 +32,7 @@ extern "C" {
 #define SP_PROT_TLS1_0_CLIENT SP_PROT_TLS1_CLIENT
 #define SP_PROT_TLS1_1_CLIENT 512
 #define SP_PROT_TLS1_2_CLIENT 2048
+#define SP_PROT_TLS1_3_CLIENT 8192
 
 #define SP_PROT_SSL2_SERVER   4
 #define SP_PROT_SSL3_SERVER   16