diff --git a/ports/qemu/mpconfigport.h b/ports/qemu/mpconfigport.h
index 3f3688569b..dcaf6a5c51 100644
--- a/ports/qemu/mpconfigport.h
+++ b/ports/qemu/mpconfigport.h
@@ -54,9 +54,6 @@
 #define MICROPY_LONGINT_IMPL        (MICROPY_LONGINT_IMPL_MPZ)
 #define MICROPY_WARNINGS            (1)
 #define MICROPY_PY_SYS_PLATFORM     "qemu"
-#define MICROPY_PY_SYS_STDIO_BUFFER (0)
-#define MICROPY_PY_SELECT           (0)
-#define MICROPY_PY_TIME             (0)
 #define MICROPY_PY_ASYNCIO          (0)
 #define MICROPY_PY_MACHINE          (1)
 #define MICROPY_PY_MACHINE_INCLUDEFILE "ports/qemu/modmachine.c"