diff --git a/comm.c b/comm.c
index 7673320..4bd6952 100644
--- a/comm.c
+++ b/comm.c
@@ -421,18 +421,18 @@ void main(void)
             __endasm;
         }
 
-        //trade_byte_primary();
+        // trade_byte_primary();
         // See https://github.com/gbdk-2020/gbdk-2020/pull/577
         __asm
-		LD	A,#0x02         ; .IO_RECEIVING
-		LD	(__io_status),A ; Store status
-		LD	A,#0x01
-		LDH	(0x02),A		; (.SC) Use external clock
-		LD	A,(__io_out)
-		LDH	(0x01),A		; (.SB) Send __io_out byte
-		LD	A,#0x81
-		LDH	(0x02),A		; (.SC) Use external clock
-	__endasm;
+            LD	A,#0x02                 ; .IO_RECEIVING
+            LD	(__io_status),A         ; Store status
+            LD	A,#0x01
+            LDH	(0x02),A                ; (.SC) Use external clock
+            LD	A,(__io_out)
+            LDH	(0x01),A                ; (.SB) Send __io_out byte
+            LD	A,#0x81
+            LDH	(0x02),A                ; (.SC) Use external clock
+        __endasm;
 
         while(_io_status == IO_RECEIVING || _io_status == IO_SENDING);