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-rw-r--r--ports/stm32/usb.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ports/stm32/usb.c b/ports/stm32/usb.c
index b0bdb3a08..718fa898c 100644
--- a/ports/stm32/usb.c
+++ b/ports/stm32/usb.c
@@ -389,7 +389,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_usb_vcp_isconnected_obj, pyb_usb_vcp_isconn
// deprecated in favour of USB_VCP.isconnected
STATIC mp_obj_t pyb_have_cdc(void) {
- return pyb_usb_vcp_isconnected(MP_OBJ_NULL);
+ return pyb_usb_vcp_isconnected(MP_OBJ_FROM_PTR(&pyb_usb_vcp_obj));
}
MP_DEFINE_CONST_FUN_OBJ_0(pyb_have_cdc_obj, pyb_have_cdc);