diff --git a/lib/private-libwebsockets.h b/lib/private-libwebsockets.h
index cafb479c..9d3723e4 100644
--- a/lib/private-libwebsockets.h
+++ b/lib/private-libwebsockets.h
@@ -93,6 +93,44 @@ static inline void debug(const char *format, ...)
 #define MAX_WEBSOCKET_04_KEY_LEN 128
 #define SYSTEM_RANDOM_FILEPATH "/dev/urandom"
 
+/*
+ * From 06 sped
+   1000
+
+      1000 indicates a normal closure, meaning whatever purpose the
+      connection was established for has been fulfilled.
+
+   1001
+
+      1001 indicates that an endpoint is "going away", such as a server
+      going down, or a browser having navigated away from a page.
+
+   1002
+
+      1002 indicates that an endpoint is terminating the connection due
+      to a protocol error.
+
+   1003
+
+      1003 indicates that an endpoint is terminating the connection
+      because it has received a type of data it cannot accept (e.g. an
+      endpoint that understands only text data may send this if it
+      receives a binary message.)
+
+   1004
+
+      1004 indicates that an endpoint is terminating the connection
+      because it has received a message that is too large.
+*/
+
+enum lws_close_status {
+	LWS_CLOSE_STATUS_NORMAL = 1000,
+	LWS_CLOSE_STATUS_GOINGAWAY = 1001,
+	LWS_CLOSE_STATUS_PROTOCOL_ERR = 1002,
+	LWS_CLOSE_STATUS_UNACCEPTABLE_OPCODE = 1003,
+	LWS_CLOSE_STATUS_PAYLOAD_TOO_LARGE = 1004,
+};
+
 enum lws_websocket_opcodes_04 {
 	LWS_WS_OPCODE_04__CONTINUATION = 0,
 	LWS_WS_OPCODE_04__CLOSE = 1,