diff --git a/zip-0316.rst b/zip-0316.rst
index a836ffa9..58686f0f 100644
--- a/zip-0316.rst
+++ b/zip-0316.rst
@@ -426,8 +426,9 @@ Requirements for both Unified Addresses and Unified Viewing Keys
 * A Unified Address or Unified Viewing Key MUST NOT contain only
   transparent P2SH or P2PKH addresses (Typecodes :math:`\mathtt{0x00}`
   and :math:`\mathtt{0x01}`). The rationale is that the existing
-  P2SH and P2PKH transparent-only address formats suffice for this
-  purpose and are already supported by the existing ecosystem.
+  P2SH and P2PKH transparent-only address formats, and the existing
+  P2PKH extended public key format, suffice for this purpose and are
+  already supported by the existing ecosystem.
 
 * The :math:`\mathtt{typecode}` and :math:`\mathtt{length}` fields are
   encoded as :math:`\mathtt{compactSize}.` [#Bitcoin-CompactSize]_