diff --git a/variants/arduino_giga_r1_stm32h747xx_m7/pure_analog_pins.h b/variants/arduino_giga_r1_stm32h747xx_m7/pure_analog_pins.h
index bc8bd104..dba5299d 100644
--- a/variants/arduino_giga_r1_stm32h747xx_m7/pure_analog_pins.h
+++ b/variants/arduino_giga_r1_stm32h747xx_m7/pure_analog_pins.h
@@ -1,5 +1,6 @@
 #ifndef _PURE_ANALOG_PINS_
 #define _PURE_ANALOG_PINS_
+#ifdef __cplusplus
 
 /******************************************************************************
  * INCLUDE
@@ -54,4 +55,6 @@ void      PURE_ANALOG_AS_DIGITAL_ATTRIBUTE analogWrite (PureAnalogPin pin, int v
 
 #undef PURE_ANALOG_AS_DIGITAL_ATTRIBUTE
 
+#endif /* __cplusplus */
+
 #endif /* _PURE_ANALOG_PINS_ */
diff --git a/variants/arduino_portenta_h7_stm32h747xx_m7/pure_analog_pins.h b/variants/arduino_portenta_h7_stm32h747xx_m7/pure_analog_pins.h
index 9df13056..dbed40b7 100644
--- a/variants/arduino_portenta_h7_stm32h747xx_m7/pure_analog_pins.h
+++ b/variants/arduino_portenta_h7_stm32h747xx_m7/pure_analog_pins.h
@@ -5,6 +5,7 @@
  */
 #ifndef _PURE_ANALOG_PINS_
 #define _PURE_ANALOG_PINS_
+#ifdef __cplusplus
 
 /******************************************************************************
  * INCLUDE
@@ -59,4 +60,6 @@ void      PURE_ANALOG_AS_DIGITAL_ATTRIBUTE analogWrite (PureAnalogPin pin, int v
 
 #undef PURE_ANALOG_AS_DIGITAL_ATTRIBUTE
 
+#endif /* __cplusplus */
+
 #endif /* _PURE_ANALOG_PINS_ */