diff --git a/draft-ietf-quic-http.md b/draft-ietf-quic-http.md
index 451000519c..1d65172436 100644
--- a/draft-ietf-quic-http.md
+++ b/draft-ietf-quic-http.md
@@ -2174,8 +2174,10 @@ NO_ERROR (0x0):
 : HTTP_NO_ERROR in {{http-error-codes}}.
 
 PROTOCOL_ERROR (0x1):
-: No single mapping.  See new HTTP_MALFORMED_FRAME error codes defined in
-  {{http-error-codes}}.
+: This is mapped to HTTP_GENERAL_PROTOCOL_ERROR except in cases where more
+  specific error codes have been defined. This includes HTTP_MALFORMED_FRAME,
+  HTTP_WRONG_STREAM, HTTP_UNEXPECTED_FRAME and HTTP_CLOSED_CRITICAL_STREAM
+  defined in {{http-error-codes}}.
 
 INTERNAL_ERROR (0x2):
 : HTTP_INTERNAL_ERROR in {{http-error-codes}}.