diff --git a/index.bs b/index.bs
index 1626b97..b818f94 100644
--- a/index.bs
+++ b/index.bs
@@ -6336,6 +6336,9 @@ steps may throw an exception.
       : If [=ECMAScript/Type=](|input|) is Number
       ::
           1. If |input| is NaN then return invalid.
+
+          1. If |input| is -0 (negative zero), then return a new [=/key=] with [=key/type=] *number* and [=key/value=] 0 (zero).
+
           1. Otherwise, return a new [=/key=] with
               [=key/type=] *number* and [=key/value=]
               |input|.
@@ -6716,6 +6719,7 @@ For the revision history of the second edition, see [that document's Revision Hi
 * Specified the {{DOMException}} type for failures when reading a value from the underlying storage in [[#object-store-retrieval-operation]]. (<#423>)
 * Updated [=convert a value to a key=] to return invalid for detached array buffers. (<#417>)
 * Updated {{IDBFactory/open()}} to set its request's [=request/processed flag=] to true.
+* Added normalization for negative zero for keys. (<#375>)
 
 <!-- ============================================================ -->
 # Acknowledgements # {#acknowledgements}