Implement PEP 393.
diff --git a/Objects/stringlib/unicodedefs.h b/Objects/stringlib/unicodedefs.h
index 09dae6d..0c40b80 100644
--- a/Objects/stringlib/unicodedefs.h
+++ b/Objects/stringlib/unicodedefs.h
@@ -6,6 +6,8 @@
    compiled as unicode. */
 #define STRINGLIB_IS_UNICODE     1
 
+#define FASTSEARCH               fastsearch
+#define STRINGLIB(F)             stringlib_##F
 #define STRINGLIB_OBJECT         PyUnicodeObject
 #define STRINGLIB_CHAR           Py_UNICODE
 #define STRINGLIB_TYPE_NAME      "unicode"