diff --git a/zip-0316.rst b/zip-0316.rst
index f5ec2e1b..2cc8c3df 100644
--- a/zip-0316.rst
+++ b/zip-0316.rst
@@ -431,7 +431,7 @@ The following FVK or IVK Encodings are used in place of the
 
 * A Sapling IVK Encoding, also with Typecode :math:`\mathtt{0x02},`
   is an encoding of :math:`(\mathsf{dk}, \mathsf{ivk})` given by
-  :math:`\mathsf{I2LEOSP}_{88}(\mathsf{dk})\,||\,\mathsf{I2LEOSP}_{256}(\mathsf{ivk}).`
+  :math:`\mathsf{I2LEOSP}_{256}(\mathsf{dk})\,||\,\mathsf{I2LEOSP}_{256}(\mathsf{ivk}).`
 
 * There is no defined way to represent a Viewing Key for a Transparent
   P2SH Address in a UFVK or UIVK (because P2SH Addresses cannot be