diff --git a/Include/pythonrun.h b/Include/pythonrun.h
index ef4b727442a935..4d459cb92e36ea 100644
--- a/Include/pythonrun.h
+++ b/Include/pythonrun.h
@@ -28,7 +28,7 @@ PyAPI_DATA(int) (*PyOS_InputHook)(void);
 #if defined(_Py_ADDRESS_SANITIZER) || defined(_Py_THREAD_SANITIZER)
 #  define PYOS_STACK_MARGIN 4096
 #elif defined(Py_DEBUG) && defined(WIN32)
-#  define PYOS_STACK_MARGIN 3072
+#  define PYOS_STACK_MARGIN 4096
 #elif defined(__wasi__)
    /* Web assembly has two stacks, so this isn't really a size */
 #  define PYOS_STACK_MARGIN 500