1 files changed, 5 insertions, 1 deletions
diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c
index 2149d89..da66a82 100644
--- a/Python/pylifecycle.c
+++ b/Python/pylifecycle.c
@@ -1561,9 +1561,13 @@ new_interpreter(PyThreadState **tstate_p, int isolated_subinterpreter)
 
     /* Copy the current interpreter config into the new interpreter */
     const PyConfig *config;
+#ifndef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
     if (save_tstate != NULL) {
         config = _PyInterpreterState_GetConfig(save_tstate->interp);
-    } else {
+    }
+    else
+#endif
+    {
         /* No current thread state, copy from the main interpreter */
         PyInterpreterState *main_interp = PyInterpreterState_Main();
         config = _PyInterpreterState_GetConfig(main_interp);