diff --git a/HISTORY.rst b/HISTORY.rst
index d1dbb7f..1985004 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -11,30 +11,30 @@ History
   * ``pxp_financial``
   * ``trustpay``
 
-* Equivalent domain names are now normalized when ``hash_address`` is used.
+* Equivalent domain names are now normalized when ``hash_email`` is used.
   For example, ``googlemail.com`` will become ``gmail.com``.
 * Periods are now removed from ``gmail.com`` email address local parts when
-  ``hash_address`` is used. For example, ``f.o.o@gmail.com`` will become
+  ``hash_email`` is used. For example, ``f.o.o@gmail.com`` will become
   ``foo@gmail.com``.
 * Fastmail alias subdomain email addresses are now normalized when
-  ``hash_address`` is used. For example, ``alias@user.fastmail.com`` will
+  ``hash_email`` is used. For example, ``alias@user.fastmail.com`` will
   become ``user@fastmail.com``.
 * Additional ``yahoo.com`` email addresses now have aliases removed from
-  their local part when ``hash_address`` is used. For example,
+  their local part when ``hash_email`` is used. For example,
   ``foo-bar@yahoo.com`` will become ``foo@yahoo.com`` for additional
   ``yahoo.com`` domains.
 * Duplicate ``.com`` s are now removed from email domain names when
-  ``hash_address`` is used. For example, ``example.com.com`` will become
+  ``hash_email`` is used. For example, ``example.com.com`` will become
   ``example.com``.
 * Extraneous characters after ``.com`` are now removed from email domain
-  names when ``hash_address`` is used. For example, ``example.comfoo`` will
+  names when ``hash_email`` is used. For example, ``example.comfoo`` will
   become ``example.com``.
-* Certain ``.com`` typos are now normalized to ``.com`` when ``hash_address`` is
+* Certain ``.com`` typos are now normalized to ``.com`` when ``hash_email`` is
   used. For example, ``example.cam`` will become ``example.com``.
 * Additional ``gmail.com`` domain names with leading digits are now
-  normalized when ``hash_address`` is used. For example, ``100gmail.com`` will
+  normalized when ``hash_email`` is used. For example, ``100gmail.com`` will
   become ``gmail.com``.
-* Additional ``gmail.com`` typos are now normalized when ``hash_address`` is
+* Additional ``gmail.com`` typos are now normalized when ``hash_email`` is
   used. For example, ``gmali.com`` will become ``gmail.com``.
 
 2.9.0 (2023-12-05)
diff --git a/minfraud/request.py b/minfraud/request.py
index c36442a..bc36e17 100644
--- a/minfraud/request.py
+++ b/minfraud/request.py
@@ -283,7 +283,7 @@ def maybe_hash_email(transaction):
         return
 
     address, domain = _clean_email(address)
-    if not address:
+    if address is None:
         return
 
     if domain != "" and "domain" not in email: