diff --git a/configs/esp32-core/include/board.h b/configs/esp32-core/include/board.h
index 6e24654f39..a08840fbe0 100644
--- a/configs/esp32-core/include/board.h
+++ b/configs/esp32-core/include/board.h
@@ -47,7 +47,7 @@
 
 /* Clock reconfiguration is currently disabled, so the CPU will be running
  * at the XTAL frequency.
- *.
+ */
 
 #if 0
 #  define BOARD_CLOCK_FREQUENCY 80000000