diff --git a/quantum/split_common/serial_backward_compatibility.h b/quantum/split_common/serial_backward_compatibility.h
index 2d4f068630..216b6c41ff 100644
--- a/quantum/split_common/serial_backward_compatibility.h
+++ b/quantum/split_common/serial_backward_compatibility.h
@@ -1,8 +1,8 @@
 /* serial.h backward compatibility */
 
-#ifndef SOFT_SERIAL_PIN
- #define SOFT_SERIAL_PIN D0
-#endif
+// #ifndef SOFT_SERIAL_PIN
+//  #define SOFT_SERIAL_PIN D0
+// #endif
 
 #ifndef SERIAL_SLAVE_BUFFER_LENGTH
  #define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2