diff --git a/firmware/config/boards/prometheus/efifeatures.h b/firmware/config/boards/prometheus/efifeatures.h
index 49b00cea79..3401fdd8d2 100644
--- a/firmware/config/boards/prometheus/efifeatures.h
+++ b/firmware/config/boards/prometheus/efifeatures.h
@@ -40,8 +40,6 @@
 #undef EFI_UART_GPS
 #define EFI_UART_GPS FALSE
 
-#undef TS_SECONDARY_UxART_PORT
-
 #undef EFI_BLUETOOTH_SETUP
 #define EFI_BLUETOOTH_SETUP TRUE
 
diff --git a/firmware/config/boards/subaru_eg33/efifeatures.h b/firmware/config/boards/subaru_eg33/efifeatures.h
index 490c127f3a..5ed55ef022 100644
--- a/firmware/config/boards/subaru_eg33/efifeatures.h
+++ b/firmware/config/boards/subaru_eg33/efifeatures.h
@@ -24,9 +24,6 @@
 #undef TS_PRIMARY_UxART_PORT
 #define TS_PRIMARY_UxART_PORT		SD1
 
-// no secondary channel
-#undef TS_SECONDARY_UxART_PORT
-
 /* Knock detection */
 #undef EFI_HIP_9011
 #define EFI_HIP_9011				TRUE
diff --git a/firmware/config/stm32f4ems/efifeatures.h b/firmware/config/stm32f4ems/efifeatures.h
index c7678fb293..3da897d948 100644
--- a/firmware/config/stm32f4ems/efifeatures.h
+++ b/firmware/config/stm32f4ems/efifeatures.h
@@ -398,8 +398,6 @@
 #define TS_PRIMARY_UxART_PORT UARTD3
 #endif
 
-#undef TS_SECONDARY_UxART_PORT
-
 #define AUX_SERIAL_DEVICE (&SD6)
 
 #ifndef EFI_CONSOLE_TX_BRAIN_PIN