diff --git a/.meta.toml b/.meta.toml
index f8e05ee3c3..51f8d75edd 100644
--- a/.meta.toml
+++ b/.meta.toml
@@ -104,7 +104,6 @@ additional-rules = [
     "recursive-include src *.svg",
     "recursive-include src *.ttf",
     "recursive-include src *.txt",
-    "recursive-include src *.types",
     "recursive-include src *.webmanifest",
     "recursive-include src *.woff",
     "recursive-include src *.woff2",
diff --git a/CHANGES.rst b/CHANGES.rst
index af4740762a..690f733840 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -10,8 +10,7 @@ https://github.com/zopefoundation/Zope/blob/4.x/CHANGES.rst
 5.9.1 (unreleased)
 ------------------
 
-- Define a custom MIME type for Zope Page Templates
-  instead of relying on platform-dependent MIME type configurations.
+- Recognize Page Templates by file extension for WebDAV.
   (`#1212 <https://github.com/zopefoundation/Zope/issues/1212>`_)
 
 - Clean up and fix installation documentation.
diff --git a/MANIFEST.in b/MANIFEST.in
index d7c1523a2d..8d9d6e273c 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -43,7 +43,6 @@ recursive-include src *.rst
 recursive-include src *.svg
 recursive-include src *.ttf
 recursive-include src *.txt
-recursive-include src *.types
 recursive-include src *.webmanifest
 recursive-include src *.woff
 recursive-include src *.woff2
diff --git a/src/Products/PageTemplates/__init__.py b/src/Products/PageTemplates/__init__.py
index 19e91ba625..62cac12138 100644
--- a/src/Products/PageTemplates/__init__.py
+++ b/src/Products/PageTemplates/__init__.py
@@ -15,10 +15,6 @@
 This wrapper allows the Page Template modules to be segregated in a
 separate package.
 """
-import os
-
-from zope.contenttype import add_files
-
 
 # Placeholder for Zope Product data
 misc_ = {}
@@ -33,8 +29,3 @@ def initialize(context):
     # Import lazily, and defer initialization to the module
     from . import ZopePageTemplate
     ZopePageTemplate.initialize(context)
-
-    # Add the custom MIME type information for Page Templates
-    # to the Python mimetypes module so they are recognized correctly
-    here = os.path.dirname(os.path.abspath(__file__))
-    add_files([os.path.join(here, 'mime.types')])
diff --git a/src/Products/PageTemplates/mime.types b/src/Products/PageTemplates/mime.types
deleted file mode 100644
index 2223b74bd5..0000000000
--- a/src/Products/PageTemplates/mime.types
+++ /dev/null
@@ -1 +0,0 @@
-application/vnd.zopefoundation.pagetemplate     pt zpt
diff --git a/src/webdav/NullResource.py b/src/webdav/NullResource.py
index 1cbbbd3568..687803a3d7 100644
--- a/src/webdav/NullResource.py
+++ b/src/webdav/NullResource.py
@@ -114,9 +114,7 @@ def _default_PUT_factory(self, name, typ, body):
 
         if ext == '.dtml':
             ob = DTMLDocument('', __name__=name)
-        elif typ in ('text/html',
-                     'text/xml',
-                     'application/vnd.zopefoundation.pagetemplate'):
+        elif ext in ('.pt', '.zpt') or typ in ('text/html', 'text/xml'):
             ob = ZopePageTemplate(name, body, content_type=typ)
         elif typ.startswith('image/'):
             ob = Image(name, '', body, content_type=typ)