diff -r a9f73b44ea0e Doc/c-api/memory.rst
--- a/Doc/c-api/memory.rst	Tue Dec 24 16:13:32 2013 -0500
+++ b/Doc/c-api/memory.rst	Wed Dec 25 05:08:46 2013 +0400
@@ -323,6 +323,12 @@
 
    Set the arena allocator.
 
+.. c:function:: void* PyObject_Malloc(size_t n)
+
+   if *n* is less than 512, allocates *n* bytes with *pymalloc* allocator and
+   returns a pointer of type :c:type:`void\*` to the allocated memory, or
+   *NULL* if the request fails.
+   Falls back to :c:func:`PyMem_RawMalloc` for allocations larger than 512 bytes.
 
 .. _memoryexamples: