4 files changed, 13 insertions, 13 deletions
diff --git a/keyboards/converter/palm_usb/post_rules.mk b/keyboards/converter/palm_usb/post_rules.mk
new file mode 100644
index 0000000000..9c11076701
--- /dev/null
+++ b/keyboards/converter/palm_usb/post_rules.mk
@@ -0,0 +1,7 @@
+ifdef HARDWARE_SERIAL
+  # Untested with palm_usb
+  SRC += protocol/serial_uart.c
+  OPT_DEFS += -DHARDWARE_SERIAL
+else
+  SRC += protocol/serial_soft.c
+endif
diff --git a/keyboards/converter/palm_usb/rules.mk b/keyboards/converter/palm_usb/rules.mk
index ff1ddc8f49..dc8cf17400 100644
--- a/keyboards/converter/palm_usb/rules.mk
+++ b/keyboards/converter/palm_usb/rules.mk
@@ -25,12 +25,5 @@ SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
 CUSTOM_MATRIX = yes
 
 SRC += matrix.c
-ifdef HARDWARE_SERIAL
-  # Untested with palm_usb
-  SRC += protocol/serial_uart.c
-  OPT_DEFS += -DHARDWARE_SERIAL
-else
-  SRC += protocol/serial_soft.c
-endif
 
 DEFAULT_FOLDER = converter/palm_usb/stowaway
diff --git a/keyboards/converter/sun_usb/post_rules.mk b/keyboards/converter/sun_usb/post_rules.mk
new file mode 100644
index 0000000000..2ea1f0a5bf
--- /dev/null
+++ b/keyboards/converter/sun_usb/post_rules.mk
@@ -0,0 +1,6 @@
+ifdef HARDWARE_SERIAL
+  SRC += protocol/serial_uart.c
+  OPT_DEFS += -DHARDWARE_SERIAL
+else
+  SRC += protocol/serial_soft.c
+endif
diff --git a/keyboards/converter/sun_usb/rules.mk b/keyboards/converter/sun_usb/rules.mk
index e863d25745..14dd57e1b7 100644
--- a/keyboards/converter/sun_usb/rules.mk
+++ b/keyboards/converter/sun_usb/rules.mk
@@ -25,11 +25,5 @@ SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
 CUSTOM_MATRIX = yes
 
 SRC += matrix.c led.c
-ifdef HARDWARE_SERIAL
-  SRC += protocol/serial_uart.c
-  OPT_DEFS += -DHARDWARE_SERIAL
-else
-  SRC += protocol/serial_soft.c
-endif
 
 DEFAULT_FOLDER = converter/sun_usb/type5