diff --git a/src/humanize/filesize.py b/src/humanize/filesize.py
index <HASH>..<HASH> 100644
--- a/src/humanize/filesize.py
+++ b/src/humanize/filesize.py
@@ -23,6 +23,9 @@ def naturalsize(value, binary=False, gnu=False, format="%.1f"):
         gnu (bool): If `True`, the binary argument is ignored and GNU-style
             (`ls -sh` style) prefixes are used (K, M) with the 2**10 definition.
         format (str): Custom formatter.
+
+    Returns:
+        str: Human readable representation of a filesize.
     """
     if gnu:
         suffix = suffixes["gnu"]
diff --git a/src/humanize/i18n.py b/src/humanize/i18n.py
index <HASH>..<HASH> 100644
--- a/src/humanize/i18n.py
+++ b/src/humanize/i18n.py
@@ -36,6 +36,9 @@ def activate(locale, path=None):
 
     Returns:
         dict: Translations.
+
+    Raises:
+        Exception: If humanize cannot find the locale folder.
     """
     if path is None:
         path = _get_default_locale_path()
Add some missing returns/raises