diff -r 136adbcefa5f Doc/library/zlib.rst
--- a/Doc/library/zlib.rst	Sun Jan 03 18:00:31 2016 -0800
+++ b/Doc/library/zlib.rst	Sat Jan 30 20:32:55 2016 +0200
@@ -46,7 +46,7 @@
       platforms, use ``adler32(data) & 0xffffffff``.
 
 
-.. function:: compress(data[, level])
+.. function:: compress(data, level=6)
 
    Compresses the bytes in *data*, returning a bytes object containing compressed data.
    *level* is an integer from ``0`` to ``9`` controlling the level of compression;
diff -r 136adbcefa5f Modules/clinic/zlibmodule.c.h
--- a/Modules/clinic/zlibmodule.c.h	Sun Jan 03 18:00:31 2016 -0800
+++ b/Modules/clinic/zlibmodule.c.h	Sat Jan 30 20:32:55 2016 +0200
@@ -3,7 +3,7 @@
 [clinic start generated code]*/
 
 PyDoc_STRVAR(zlib_compress__doc__,
-"compress($module, bytes, level=Z_DEFAULT_COMPRESSION, /)\n"
+"compress($module, /, bytes, level=Z_DEFAULT_COMPRESSION)\n"
 "--\n"
 "\n"
 "Returns a bytes object containing compressed data.\n"
@@ -14,19 +14,20 @@
 "    Compression level, in 0-9.");
 
 #define ZLIB_COMPRESS_METHODDEF    \
-    {"compress", (PyCFunction)zlib_compress, METH_VARARGS, zlib_compress__doc__},
+    {"compress", (PyCFunction)zlib_compress, METH_VARARGS|METH_KEYWORDS, zlib_compress__doc__},
 
 static PyObject *
 zlib_compress_impl(PyModuleDef *module, Py_buffer *bytes, int level);
 
 static PyObject *
-zlib_compress(PyModuleDef *module, PyObject *args)
+zlib_compress(PyModuleDef *module, PyObject *args, PyObject *kwargs)
 {
     PyObject *return_value = NULL;
+    static char *_keywords[] = {"bytes", "level", NULL};
     Py_buffer bytes = {NULL, NULL};
     int level = Z_DEFAULT_COMPRESSION;
 
-    if (!PyArg_ParseTuple(args, "y*|i:compress",
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "y*|i:compress", _keywords,
         &bytes, &level))
         goto exit;
     return_value = zlib_compress_impl(module, &bytes, level);
@@ -438,4 +439,4 @@
 #ifndef ZLIB_COMPRESS_COPY_METHODDEF
     #define ZLIB_COMPRESS_COPY_METHODDEF
 #endif /* !defined(ZLIB_COMPRESS_COPY_METHODDEF) */
-/*[clinic end generated code: output=7734aec079550bc8 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=a759593a762e0983 input=a9049054013a1b77]*/
diff -r 136adbcefa5f Modules/zlibmodule.c
--- a/Modules/zlibmodule.c	Sun Jan 03 18:00:31 2016 -0800
+++ b/Modules/zlibmodule.c	Sat Jan 30 20:32:55 2016 +0200
@@ -141,14 +141,13 @@
         Binary data to be compressed.
     level: int(c_default="Z_DEFAULT_COMPRESSION") = Z_DEFAULT_COMPRESSION
         Compression level, in 0-9.
-    /
 
 Returns a bytes object containing compressed data.
 [clinic start generated code]*/
 
 static PyObject *
 zlib_compress_impl(PyModuleDef *module, Py_buffer *bytes, int level)
-/*[clinic end generated code: output=5d7dd4588788efd3 input=be3abe9934bda4b3]*/
+/*[clinic end generated code: output=5d7dd4588788efd3 input=1f9aff7f99080b37]*/
 {
     PyObject *ReturnVal = NULL;
     Byte *input, *output = NULL;