diff --git a/radio/src/hal/adc_driver.cpp b/radio/src/hal/adc_driver.cpp
index 01814b4da..6569f19ce 100644
--- a/radio/src/hal/adc_driver.cpp
+++ b/radio/src/hal/adc_driver.cpp
@@ -115,7 +115,7 @@ static bool adcSingleRead()
   return true;
 }
 
-bool adcRead()
+bool adcRead() __attribute__((weak))
 {
   uint16_t temp[NUM_ANALOGS] = { 0 };
 
diff --git a/radio/src/hal/adc_driver.h b/radio/src/hal/adc_driver.h
index c240b6e8f..3f7f02642 100644
--- a/radio/src/hal/adc_driver.h
+++ b/radio/src/hal/adc_driver.h
@@ -52,8 +52,10 @@ struct etx_hal_adc_driver_t {
 };
 
 bool adcInit(const etx_hal_adc_driver_t* driver);
-//void adcDeInit();
+// void adcDeInit();
+
+// Declare adcRead() weak so it can be re-declared
+bool adcRead() __attribute__((weak));
 
-bool     adcRead();
 uint16_t getRTCBatteryVoltage();
 uint16_t getAnalogValue(uint8_t index);
diff --git a/radio/src/targets/horus/board.cpp b/radio/src/targets/horus/board.cpp
index f3d10e507..b215f753d 100644
--- a/radio/src/targets/horus/board.cpp
+++ b/radio/src/targets/horus/board.cpp
@@ -21,7 +21,14 @@
 #include "opentx.h"
 
 #include "hal/adc_driver.h"
-#include "../common/arm/stm32/stm32_hal_adc.h"
+
+#if !defined(PCBX12S)
+  #include "../common/arm/stm32/stm32_hal_adc.h"
+  #define ADC_DRIVER stm32_hal_adc_driver
+#else
+  #include "x12_adc_driver.h"
+  #define ADC_DRIVER x12s_adc_driver
+#endif
 
 #if defined(__cplusplus)
 extern "C" {
@@ -200,7 +207,7 @@ void boardInit()
   }
 #endif
 
-  if (!adcInit(&stm32_hal_adc_driver))
+  if (!adcInit(&ADC_DRIVER))
       TRACE("adcInit failed");
 
   lcdInit();
diff --git a/radio/src/targets/horus/x12s_adc_driver.cpp b/radio/src/targets/horus/x12s_adc_driver.cpp
index b8127bddc..e4628cd96 100644
--- a/radio/src/targets/horus/x12s_adc_driver.cpp
+++ b/radio/src/targets/horus/x12s_adc_driver.cpp
@@ -100,7 +100,7 @@ static void ADS7952_Init()
   ADC_CS_HIGH();
 }
 
-void adcInit()
+static bool x12s_adc_init()
 {
   ADS7952_Init();
 
@@ -227,6 +227,8 @@ bool adcOnChipReadFinished()
   return (ADC_DMA->LISR & DMA_LISR_TCIF0);
 }
 
+// Re-declare adcRead()
+// (takes precedence over hal/adc_driver.cpp)
 void adcRead()
 {
   uint16_t temp[NUM_ANALOGS-MOUSE1] = { 0 };
@@ -279,3 +281,14 @@ uint16_t getAnalogValue(uint8_t index)
     return adcValues[index];
 }
 #endif // #if !defined(SIMU)
+
+//TODO: implement these based on stm32_hal_adc.cpp
+//static bool x12s_adc_init();
+//static bool x12s_adc_start_read();
+//static void x12s_adc_wait_completion();
+
+const etx_hal_adc_driver_t x12s_adc_driver = {
+  x12s_adc_init,
+  nullptr,//x12s_adc_start_read,
+  nullptr,//x12s_adc_wait_completion
+};
diff --git a/radio/src/targets/horus/x12s_adc_driver.h b/radio/src/targets/horus/x12s_adc_driver.h
new file mode 100644
index 000000000..7e8fc8c2c
--- /dev/null
+++ b/radio/src/targets/horus/x12s_adc_driver.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) EdgeTx
+ *
+ * Based on code named
+ *   opentx - https://github.com/opentx/opentx
+ *   th9x - http://code.google.com/p/th9x
+ *   er9x - http://code.google.com/p/er9x
+ *   gruvin9x - http://code.google.com/p/gruvin9x
+ *
+ * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#pragma once
+
+#include "hal/adc_driver.h"
+
+extern const etx_hal_adc_driver_t x12s_adc_driver;