diff --git a/keyboards/annepro2/boards/ANNEPRO2_C18/board.h b/keyboards/annepro2/boards/ANNEPRO2_C18/board.h
index 77f15bae358..0251a3a0411 100644
--- a/keyboards/annepro2/boards/ANNEPRO2_C18/board.h
+++ b/keyboards/annepro2/boards/ANNEPRO2_C18/board.h
@@ -33,6 +33,8 @@
 /*
  * I/O
  */
+#define LINE_UART_TX                PAL_LINE(IOPORTB,  0)
+#define LINE_UART_RX                PAL_LINE(IOPORTB,  1)
 
 // outputs (rows are pulled low)
 #define LINE_ROW1                   PAL_LINE(IOPORTB,  5)