diff --git a/include/ntapi/nt_tty.h b/include/ntapi/nt_tty.h
index ebcb4d5..4c626c2 100644
--- a/include/ntapi/nt_tty.h
+++ b/include/ntapi/nt_tty.h
@@ -87,12 +87,6 @@ typedef enum _nt_tty_session_type {
 } nt_tty_session_type;
 
 
-typedef enum _nt_tty_info_class {
-	NT_TTY_SESSION_INFORMATION,
-	NT_TTY_INFORMATION_CAP
-} nt_tty_info_class;
-
-
 typedef enum _nt_pty_info_class {
 	NT_PTY_BASIC_INFORMATION,
 	NT_PTY_CLIENT_INFORMATION,