diff --git a/EIPS/eip-681.md b/EIPS/eip-681.md
index a3165e6a58b1c9..9d4061d39665d4 100644
--- a/EIPS/eip-681.md
+++ b/EIPS/eip-681.md
@@ -25,7 +25,8 @@ This specification supersedes ERC #67, which is a URL format for representing ar
 ### Syntax
 Payment request URLs contain "ethereum" in their schema (protocol) part and are constructed as follows:
 
-    request                 = "ethereum" ":" [ "pay-" ]target_address [ "@" chain_id ] [ "/" function_name ] [ "?" parameters ]
+    request                 = erc831_part target_address [ "@" chain_id ] [ "/" function_name ] [ "?" parameters ]
+    erc831_part             = schema and optional prefix as defined in #831 - typically "ethereum" ":" [ "pay-" ] in this case
     target_address          = ethereum_address
     chain_id                = 1*DIGIT
     function_name           = STRING