diff --git a/zip-0032.rst b/zip-0032.rst
index 768dd840..be90a210 100644
--- a/zip-0032.rst
+++ b/zip-0032.rst
@@ -199,7 +199,7 @@ The 88-bit diversifiers for a Sapling extended key are derived from its diversif
 In order to reach the maximum possible diversifier range without running into the birthday bound, we use
 FF1-AES256 as a Pseudo-Random Permutation as follows:
 
-- Let *j* be the index of the desired diversifier.
+- Let *j* be the index of the desired diversifier, in the range 0 .. 2\ :sup:`88`\ -1.
 - *d*\ :sub:`i,j` = FF1-AES256.Encrypt(*dk*\ :sub:`i`\ , "", I2LEBSP\ :sub:`88`\ (*j*))
 
 The default diversifier for a Sapling extended key is defined to be *d*\ :sub:`i,0`\ .