diff --git a/protocols/BTP.md b/protocols/BTP.md
index 10ae8227b70622e2a8a2bd0a675764bf9d011ace..1e19987c7b10277e636157acf4c1ed4295aa4503 100644
--- a/protocols/BTP.md
+++ b/protocols/BTP.md
@@ -104,7 +104,7 @@ Before two endpoints can communicate using BTP they must agree on the following
 
 - len(x) denotes the length of x in bytes
 
-- int_n(x) denotes x represented as a big-endian n-bit integer
+- int_n(x) denotes x represented as an unsigned, big-endian, n-bit integer
 
 ### 1.7 Cryptographic Primitives