diff --git a/Doc/library/lzma.rst b/Doc/library/lzma.rst
index 9bc82be..33a5428 100644
--- a/Doc/library/lzma.rst
+++ b/Doc/library/lzma.rst
@@ -225,7 +225,7 @@
 Miscellaneous
 -------------
 
-.. function:: check_is_supported(check)
+.. function:: is_check_supported(check)
 
    Returns true if the given integrity check is supported on this system.
 
diff --git a/Lib/lzma.py b/Lib/lzma.py
index 5adf51f..1c101f7 100644
--- a/Lib/lzma.py
+++ b/Lib/lzma.py
@@ -18,7 +18,7 @@
     "MODE_FAST", "MODE_NORMAL", "PRESET_DEFAULT", "PRESET_EXTREME",
 
     "LZMACompressor", "LZMADecompressor", "LZMAFile", "LZMAError",
-    "compress", "decompress", "check_is_supported",
+    "compress", "decompress", "is_check_supported",
     "encode_filter_properties", "decode_filter_properties",
 ]
 
diff --git a/Lib/test/test_lzma.py b/Lib/test/test_lzma.py
index cc08bad..97523c1 100644
--- a/Lib/test/test_lzma.py
+++ b/Lib/test/test_lzma.py
@@ -935,14 +935,14 @@
     def test_is_check_supported(self):
         # CHECK_NONE and CHECK_CRC32 should always be supported,
         # regardless of the options liblzma was compiled with.
-        self.assertTrue(lzma.check_is_supported(lzma.CHECK_NONE))
-        self.assertTrue(lzma.check_is_supported(lzma.CHECK_CRC32))
+        self.assertTrue(lzma.is_check_supported(lzma.CHECK_NONE))
+        self.assertTrue(lzma.is_check_supported(lzma.CHECK_CRC32))
 
         # The .xz format spec cannot store check IDs above this value.
-        self.assertFalse(lzma.check_is_supported(lzma.CHECK_ID_MAX + 1))
+        self.assertFalse(lzma.is_check_supported(lzma.CHECK_ID_MAX + 1))
 
         # This value should not be a valid check ID.
-        self.assertFalse(lzma.check_is_supported(lzma.CHECK_UNKNOWN))
+        self.assertFalse(lzma.is_check_supported(lzma.CHECK_UNKNOWN))
 
     def test_encode_filter_properties(self):
         with self.assertRaises(TypeError):
diff --git a/Modules/_lzmamodule.c b/Modules/_lzmamodule.c
index 2f246b8..92dd06d 100644
--- a/Modules/_lzmamodule.c
+++ b/Modules/_lzmamodule.c
@@ -1075,19 +1075,19 @@
 
 /* Module-level functions. */
 
-PyDoc_STRVAR(check_is_supported_doc,
-"check_is_supported(check_id) -> bool\n"
+PyDoc_STRVAR(is_check_supported_doc,
+"is_check_supported(check_id) -> bool\n"
 "\n"
 "Test whether the given integrity check is supported.\n"
 "\n"
 "Always returns True for CHECK_NONE and CHECK_CRC32.\n");
 
 static PyObject *
-check_is_supported(PyObject *self, PyObject *args)
+is_check_supported(PyObject *self, PyObject *args)
 {
     int check_id;
 
-    if (!PyArg_ParseTuple(args, "i:check_is_supported", &check_id))
+    if (!PyArg_ParseTuple(args, "i:is_check_supported", &check_id))
         return NULL;
 
     return PyBool_FromLong(lzma_check_is_supported(check_id));
@@ -1182,8 +1182,8 @@
 /* Module initialization. */
 
 static PyMethodDef module_methods[] = {
-    {"check_is_supported", (PyCFunction)check_is_supported,
-     METH_VARARGS, check_is_supported_doc},
+    {"is_check_supported", (PyCFunction)is_check_supported,
+     METH_VARARGS, is_check_supported_doc},
     {"encode_filter_properties", (PyCFunction)encode_filter_properties,
      METH_VARARGS, encode_filter_properties_doc},
     {"decode_filter_properties", (PyCFunction)decode_filter_properties,