diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 13301f31b4..5def05146c 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -612,6 +612,18 @@ def __init__(self, regex, **kwargs):
validator = RegexValidator(regex, message=self.error_messages['invalid'])
self.validators.append(validator)
+ def __deepcopy__(self, memo):
+ # Handling case when regex is not passed in kwargs.
+ args = self._args[:1] + copy.deepcopy(self._args[1:])
+ kwargs = dict(self._kwargs)
+
+ # deepcopy doesn't work on compiled regex pattern
+ regex = kwargs.pop('regex', None)
+ kwargs = copy.deepcopy(kwargs)
+ if regex is not None:
+ kwargs['regex'] = regex
+ return self.__class__(*args, **kwargs)
+
class SlugField(CharField):
default_error_messages = {
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