diff --git a/windows/main.c b/windows/main.c
index 59174d73df..98d293161a 100644
--- a/windows/main.c
+++ b/windows/main.c
@@ -59,7 +59,7 @@ static void execute_from_lexer(mp_lexer_t *lex, mp_parse_input_kind_t input_kind
     printf("----------------\n");
     */
 
-    mp_obj_t module_fun = mp_compile(pn, source_name, is_repl);
+    mp_obj_t module_fun = mp_compile(pn, source_name, MP_EMIT_OPT_NONE, is_repl);
 
     if (module_fun == mp_const_none) {
         // compile error
@@ -230,9 +230,3 @@ int main(int argc, char **argv) {
     //printf("total bytes = %d\n", m_get_total_bytes_allocated());
     return 0;
 }
-
-// for sqrt
-#include <math.h>
-machine_float_t machine_sqrt(machine_float_t x) {
-    return sqrt(x);
-}
diff --git a/windows/mpconfigport.h b/windows/mpconfigport.h
index 309271ba23..74fe749e1e 100644
--- a/windows/mpconfigport.h
+++ b/windows/mpconfigport.h
@@ -13,7 +13,7 @@
 #define MICROPY_ENABLE_REPL_HELPERS (1)
 #define MICROPY_ENABLE_LEXER_UNIX   (1)
 #define MICROPY_FLOAT_IMPL          (MICROPY_FLOAT_IMPL_DOUBLE)
-#define MICROPY_LONGINT_IMPL        (MICROPY_LONGINT_IMPL_LONGLONG)
+#define MICROPY_LONGINT_IMPL        (MICROPY_LONGINT_IMPL_MPZ)
 
 // type definitions for the specific machine
 
@@ -31,6 +31,5 @@ typedef unsigned int machine_uint_t; // must be pointer size
 
 typedef void *machine_ptr_t; // must be of pointer size
 typedef const void *machine_const_ptr_t; // must be of pointer size
-typedef double machine_float_t;
 
-machine_float_t machine_sqrt(machine_float_t x);
+extern const struct _mp_obj_fun_native_t mp_builtin_open_obj;