diff --git a/Modules/_decimal/_decimal.c b/Modules/_decimal/_decimal.c
index 566f22ba33b228e..99546c42688d3d7 100644
--- a/Modules/_decimal/_decimal.c
+++ b/Modules/_decimal/_decimal.c
@@ -3571,6 +3571,7 @@ dec_as_long(PyObject *dec, PyObject *context, int round)
     mpd_t *x;
     mpd_context_t workctx;
     uint32_t status = 0;
+    const PyLongLayout *layout = PyLong_GetNativeLayout();
 
     if (mpd_isspecial(MPD(dec))) {
         if (mpd_isnan(MPD(dec))) {
@@ -3599,8 +3600,9 @@ dec_as_long(PyObject *dec, PyObject *context, int round)
 
     status = 0;
     n = (mpd_sizeinbase(x, 2) +
-         PyLong_LAYOUT.bits_per_digit - 1) / PyLong_LAYOUT.bits_per_digit;
-    PyLongWriter *writer = PyLongWriter_Create(mpd_isnegative(x), n, &ob_digit);
+         layout->bits_per_digit - 1) / layout->bits_per_digit;
+    PyLongWriter *writer = PyLongWriter_Create(mpd_isnegative(x), n,
+                                               &ob_digit, layout);
     /* mpd_sizeinbase can overestimate size by 1 digit, set it to zero. */
     ob_digit[n-1] = 0;
     if (writer == NULL) {