diff --git a/src/main/drivers/adc.c b/src/main/drivers/adc.c
index 958a831b4..bdc7a6774 100644
--- a/src/main/drivers/adc.c
+++ b/src/main/drivers/adc.c
@@ -24,6 +24,7 @@
 #include "system.h"
 
 #include "adc.h"
+#include "adc_impl.h"
 
 //#define DEBUG_ADC_CHANNELS
 
diff --git a/src/main/drivers/adc_impl.h b/src/main/drivers/adc_impl.h
new file mode 100644
index 000000000..800730825
--- /dev/null
+++ b/src/main/drivers/adc_impl.h
@@ -0,0 +1,21 @@
+/*
+ * This file is part of Cleanflight.
+ *
+ * Cleanflight is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Cleanflight 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Cleanflight.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+extern adc_config_t adcConfig[ADC_CHANNEL_COUNT];
+extern volatile uint16_t adcValues[ADC_CHANNEL_COUNT];
diff --git a/src/main/drivers/adc_stm32f10x.c b/src/main/drivers/adc_stm32f10x.c
index c6c97c2f4..2becc32df 100644
--- a/src/main/drivers/adc_stm32f10x.c
+++ b/src/main/drivers/adc_stm32f10x.c
@@ -31,6 +31,7 @@
 #include "accgyro.h"
 
 #include "adc.h"
+#include "adc_impl.h"
 
 // Driver for STM32F103CB onboard ADC
 //
@@ -43,8 +44,6 @@
 //
 // CC3D Only one ADC channel supported currently, for battery on S5_IN/PA0
 
-extern adc_config_t adcConfig[ADC_CHANNEL_COUNT];
-extern volatile uint16_t adcValues[ADC_CHANNEL_COUNT];
 
 void adcInit(drv_adc_config_t *init)
 {
diff --git a/src/main/drivers/adc_stm32f30x.c b/src/main/drivers/adc_stm32f30x.c
index c18b37417..3b2fa1859 100644
--- a/src/main/drivers/adc_stm32f30x.c
+++ b/src/main/drivers/adc_stm32f30x.c
@@ -28,9 +28,7 @@
 #include "accgyro.h"
 
 #include "adc.h"
-
-extern adc_config_t adcConfig[ADC_CHANNEL_COUNT];
-extern volatile uint16_t adcValues[ADC_CHANNEL_COUNT];
+#include "adc_impl.h"
 
 #ifndef ADC_INSTANCE
 #define ADC_INSTANCE                ADC1