diff --git a/Lib/mimetypes.py b/Lib/mimetypes.py
index f3343c805452d0..da1c5e478ced1c 100644
--- a/Lib/mimetypes.py
+++ b/Lib/mimetypes.py
@@ -558,6 +558,7 @@ def _default_mime_types():
         '.pict': 'image/pict',
         '.pct' : 'image/pict',
         '.pic' : 'image/pict',
+        '.webp': 'image/webp',
         '.xul' : 'text/xul',
         }