diff --git a/Modules/_codecsmodule.c b/Modules/_codecsmodule.c
index 9520721..08a3d4a 100644
--- a/Modules/_codecsmodule.c
+++ b/Modules/_codecsmodule.c
@@ -69,6 +69,27 @@
 }
 
 /*[clinic input]
+_codecs.unregister
+    search_function: object
+    /
+
+Unregister a codec search function and clear the registry's cache.
+
+If the search function is not registered, do nothing.
+[clinic start generated code]*/
+
+static PyObject *
+_codecs_unregister(PyObject *module, PyObject *search_function)
+/*[clinic end generated code: output=1f0edee9cf246399 input=dd7c004c652d345e]*/
+{
+    if (PyCodec_Unregister(search_function) < 0) {
+        return NULL;
+    }
+
+    Py_RETURN_NONE;
+}
+
+/*[clinic input]
 _codecs.lookup
     encoding: str
     /
@@ -992,6 +1013,7 @@
 
 static PyMethodDef _codecs_functions[] = {
     _CODECS_REGISTER_METHODDEF
+    _CODECS_UNREGISTER_METHODDEF
     _CODECS_LOOKUP_METHODDEF
     _CODECS_ENCODE_METHODDEF
     _CODECS_DECODE_METHODDEF
diff --git a/Modules/clinic/_codecsmodule.c.h b/Modules/clinic/_codecsmodule.c.h
index 249065c..e2ebb68 100644
--- a/Modules/clinic/_codecsmodule.c.h
+++ b/Modules/clinic/_codecsmodule.c.h
@@ -15,6 +15,17 @@
 #define _CODECS_REGISTER_METHODDEF    \
     {"register", (PyCFunction)_codecs_register, METH_O, _codecs_register__doc__},
 
+PyDoc_STRVAR(_codecs_unregister__doc__,
+"unregister($module, search_function, /)\n"
+"--\n"
+"\n"
+"Unregister a codec search function and clear the registry\'s cache.\n"
+"\n"
+"If the search function is not registered, do nothing.");
+
+#define _CODECS_UNREGISTER_METHODDEF    \
+    {"unregister", (PyCFunction)_codecs_unregister, METH_O, _codecs_unregister__doc__},
+
 PyDoc_STRVAR(_codecs_lookup__doc__,
 "lookup($module, encoding, /)\n"
 "--\n"
@@ -2827,4 +2838,4 @@
 #ifndef _CODECS_CODE_PAGE_ENCODE_METHODDEF
     #define _CODECS_CODE_PAGE_ENCODE_METHODDEF
 #endif /* !defined(_CODECS_CODE_PAGE_ENCODE_METHODDEF) */
-/*[clinic end generated code: output=eeead01414be6e42 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=9a97e2ddf3e69072 input=a9049054013a1b77]*/