diff --git a/Lib/mimetypes.py b/Lib/mimetypes.py
index a39b543c4c9..c0316a07a0f 100644
--- a/Lib/mimetypes.py
+++ b/Lib/mimetypes.py
@@ -514,6 +514,7 @@ def _default_mime_types():
         '.ustar'  : 'application/x-ustar',
         '.vcf'    : 'text/x-vcard',
         '.wav'    : 'audio/x-wav',
+        '.webm'   : 'video/webm',
         '.wiz'    : 'application/msword',
         '.wsdl'   : 'application/xml',
         '.xbm'    : 'image/x-xbitmap',
diff --git a/Misc/NEWS b/Misc/NEWS
index c0e0e4d6d93..894d6691ebe 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -65,6 +65,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #16329: Add .webm to mimetypes.types_map.  Patch by Giampaolo Rodola'.
+
 - Issue #23735: Handle terminal resizing with Readline 6.3+ by installing our
   own SIGWINCH handler.  Patch by Eric Price.