diff --git a/embed/firmware/mphalport.c b/embed/firmware/mphalport.c
index 82bb64d9..93553d64 100644
--- a/embed/firmware/mphalport.c
+++ b/embed/firmware/mphalport.c
@@ -14,7 +14,7 @@ int mp_hal_stdin_rx_chr(void) {
         }
         return c;
     } else {
-        __fatal_error("vcp stdio is not configured", __FILE__, __LINE__, __func__);
+        __fatal_error("vcp stdio is not configured", __FILE__, __LINE__, __FUNCTION__);
     }
 }