diff --git a/Lib/plistlib.py b/Lib/plistlib.py
index 248f5143f4edf7..ee35446200796d 100644
--- a/Lib/plistlib.py
+++ b/Lib/plistlib.py
@@ -67,6 +67,7 @@
 
 PlistFormat = enum.Enum('PlistFormat', 'FMT_XML FMT_BINARY', module=__name__)
 globals().update(PlistFormat.__members__)
+global FMT_XML, FMT_BINARY  # explicitly declare globals to aid humans and linters
 
 
 #