diff --git a/src/sdcard.h b/src/sdcard.h
index 6b9cfbeed..e303a2a34 100644
--- a/src/sdcard.h
+++ b/src/sdcard.h
@@ -70,7 +70,7 @@ inline const pm_char *SDCARD_ERROR(FRESULT result)
 
 extern void sdPoll10mS();
 
-#if defined(PCBARM)
+#if defined(PCBARM) && !(defined(SIMU))
 extern "C" {
 extern uint32_t sd_card_ready();
 extern uint32_t sd_card_mounted();