diff --git a/ports/stm/boards/stm32f411ce_blackpill_with_flash/mpconfigboard.h b/ports/stm/boards/stm32f411ce_blackpill_with_flash/mpconfigboard.h
index c49c936a9b..874652cdc5 100644
--- a/ports/stm/boards/stm32f411ce_blackpill_with_flash/mpconfigboard.h
+++ b/ports/stm/boards/stm32f411ce_blackpill_with_flash/mpconfigboard.h
@@ -1,4 +1,4 @@
-`/*
+/*
  * This file is part of the MicroPython project, http://micropython.org/
  *
  * The MIT License (MIT)