diff --git a/variants/NICLA_VISION/pinmode_arduino.h b/variants/NICLA_VISION/pinmode_arduino.h
index 9b3cb2c43..97eafb56c 100644
--- a/variants/NICLA_VISION/pinmode_arduino.h
+++ b/variants/NICLA_VISION/pinmode_arduino.h
@@ -71,4 +71,7 @@ typedef enum {
 /* Redeclare Common.h functions with the updated PinMode */
 void pinMode(pin_size_t pinNumber, PinMode pinMode);
 
+/* Redeclare analogReference with deprecated attribute */
+void __attribute__((warning("Unused in this architecture"))) analogReference(uint8_t mode);
+
 #endif
\ No newline at end of file
diff --git a/variants/NICLA_VISION/variant.cpp b/variants/NICLA_VISION/variant.cpp
index a63351afc..8e62e2498 100644
--- a/variants/NICLA_VISION/variant.cpp
+++ b/variants/NICLA_VISION/variant.cpp
@@ -3,6 +3,8 @@
 
 RTC_HandleTypeDef RTCHandle;
 
+void analogReference(uint8_t mode) {}
+
 AnalogPinDescription g_AAnalogPinDescription[] = {
   { PC_4,         NULL },    // A0    ADC2_INP0
   { PF_13,        NULL },    // A1    ADC2_INP1
diff --git a/variants/PORTENTA_H7_M4/pinmode_arduino.h b/variants/PORTENTA_H7_M4/pinmode_arduino.h
index 9b3cb2c43..97eafb56c 100644
--- a/variants/PORTENTA_H7_M4/pinmode_arduino.h
+++ b/variants/PORTENTA_H7_M4/pinmode_arduino.h
@@ -71,4 +71,7 @@ typedef enum {
 /* Redeclare Common.h functions with the updated PinMode */
 void pinMode(pin_size_t pinNumber, PinMode pinMode);
 
+/* Redeclare analogReference with deprecated attribute */
+void __attribute__((warning("Unused in this architecture"))) analogReference(uint8_t mode);
+
 #endif
\ No newline at end of file
diff --git a/variants/PORTENTA_H7_M4/variant.cpp b/variants/PORTENTA_H7_M4/variant.cpp
index 3abd36f55..4239f0fd2 100644
--- a/variants/PORTENTA_H7_M4/variant.cpp
+++ b/variants/PORTENTA_H7_M4/variant.cpp
@@ -1,6 +1,8 @@
 #include "Arduino.h"
 #include "pinDefinitions.h"
 
+void analogReference(uint8_t mode) {}
+
 AnalogPinDescription g_AAnalogPinDescription[] = {
   { PA_0C,        NULL },    // A0    ADC2_INP0
   { PA_1C,        NULL },    // A1    ADC2_INP1
diff --git a/variants/PORTENTA_H7_M7/pinmode_arduino.h b/variants/PORTENTA_H7_M7/pinmode_arduino.h
index 9b3cb2c43..97eafb56c 100644
--- a/variants/PORTENTA_H7_M7/pinmode_arduino.h
+++ b/variants/PORTENTA_H7_M7/pinmode_arduino.h
@@ -71,4 +71,7 @@ typedef enum {
 /* Redeclare Common.h functions with the updated PinMode */
 void pinMode(pin_size_t pinNumber, PinMode pinMode);
 
+/* Redeclare analogReference with deprecated attribute */
+void __attribute__((warning("Unused in this architecture"))) analogReference(uint8_t mode);
+
 #endif
\ No newline at end of file
diff --git a/variants/PORTENTA_H7_M7/variant.cpp b/variants/PORTENTA_H7_M7/variant.cpp
index 52cf947e2..fb66eef7e 100644
--- a/variants/PORTENTA_H7_M7/variant.cpp
+++ b/variants/PORTENTA_H7_M7/variant.cpp
@@ -3,6 +3,8 @@
 
 RTC_HandleTypeDef RTCHandle;
 
+void analogReference(uint8_t mode) {}
+
 AnalogPinDescription g_AAnalogPinDescription[] = {
   { PA_0C,        NULL },    // A0    ADC2_INP0
   { PA_1C,        NULL },    // A1    ADC2_INP1