diff --git a/ports/raspberrypi/common-hal/adcbuffer/BufferedInput.c b/ports/raspberrypi/common-hal/adcbuffer/BufferedInput.c
index 50f2dc5d1a..b42bed2c0c 100644
--- a/ports/raspberrypi/common-hal/adcbuffer/BufferedInput.c
+++ b/ports/raspberrypi/common-hal/adcbuffer/BufferedInput.c
@@ -47,7 +47,7 @@
 void common_hal_adcbuffer_bufferedinput_construct(adcbuffer_bufferedinput_obj_t *self, const mcu_pin_obj_t *pin, uint8_t *buffer, uint32_t len, uint8_t bytes_per_sample, bool samples_signed, uint32_t sample_rate) {
 
     // Make sure pin number is in range for ADC
-    if (pin->number < ADC_FIRST_PIN_NUMBER && pin->number >= (ADC_FIRST_PIN_NUMBER + ADC_PIN_COUNT)) {
+    if (pin->number < ADC_FIRST_PIN_NUMBER || pin->number >= (ADC_FIRST_PIN_NUMBER + ADC_PIN_COUNT)) {
         raise_ValueError_invalid_pins();
     }
 
@@ -122,7 +122,6 @@ void common_hal_adcbuffer_bufferedinput_construct(adcbuffer_bufferedinput_obj_t
     // clear any previous activity
     adc_fifo_drain();
     adc_run(false);
-
 }
 
 bool common_hal_adcbuffer_bufferedinput_deinited(adcbuffer_bufferedinput_obj_t *self) {
@@ -142,7 +141,7 @@ void common_hal_adcbuffer_bufferedinput_deinit(adcbuffer_bufferedinput_obj_t *se
     dma_channel_unclaim(self->dma_chan);
 }
 
-bool common_hal_adcbuffer_bufferedinput_readmultiple(adcbuffer_bufferedinput_obj_t *self) {
+void common_hal_adcbuffer_bufferedinput_readmultiple(adcbuffer_bufferedinput_obj_t *self) {
 
     uint32_t cdl = self->len / self->bytes_per_sample;
 
@@ -163,6 +162,4 @@ bool common_hal_adcbuffer_bufferedinput_readmultiple(adcbuffer_bufferedinput_obj
     //  Clean up
     adc_run(false);
     adc_fifo_drain();
-
-    return true;
 }
diff --git a/shared-bindings/adcbuffer/BufferedInput.c b/shared-bindings/adcbuffer/BufferedInput.c
index 25e1b75cd7..da7cb9525a 100644
--- a/shared-bindings/adcbuffer/BufferedInput.c
+++ b/shared-bindings/adcbuffer/BufferedInput.c
@@ -157,7 +157,8 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(adcbuffer_bufferedinput___exit___obj,
 STATIC mp_obj_t adcbuffer_bufferedinput_obj_readmultiple(mp_obj_t self_in) {
     adcbuffer_bufferedinput_obj_t *self = MP_OBJ_TO_PTR(self_in);
     check_for_deinit(self);
-    return MP_OBJ_NEW_SMALL_INT(common_hal_adcbuffer_bufferedinput_readmultiple(self));
+    common_hal_adcbuffer_bufferedinput_readmultiple(self);
+    return mp_const_none;
 }
 MP_DEFINE_CONST_FUN_OBJ_1(adcbuffer_bufferedinput_readmultiple_obj, adcbuffer_bufferedinput_obj_readmultiple);
 
diff --git a/shared-bindings/adcbuffer/BufferedInput.h b/shared-bindings/adcbuffer/BufferedInput.h
index 42b9f94558..25411a3d7c 100644
--- a/shared-bindings/adcbuffer/BufferedInput.h
+++ b/shared-bindings/adcbuffer/BufferedInput.h
@@ -35,6 +35,6 @@ extern const mp_obj_type_t adcbuffer_bufferedinput_type;
 void common_hal_adcbuffer_bufferedinput_construct(adcbuffer_bufferedinput_obj_t *self, const mcu_pin_obj_t *pin, uint8_t *buffer, uint32_t len, uint8_t bytes_per_sample, bool samples_signed, uint32_t sample_rate);
 void common_hal_adcbuffer_bufferedinput_deinit(adcbuffer_bufferedinput_obj_t *self);
 bool common_hal_adcbuffer_bufferedinput_deinited(adcbuffer_bufferedinput_obj_t *self);
-bool common_hal_adcbuffer_bufferedinput_readmultiple(adcbuffer_bufferedinput_obj_t *self);
+void common_hal_adcbuffer_bufferedinput_readmultiple(adcbuffer_bufferedinput_obj_t *self);
 
 #endif  // __MICROPY_INCLUDED_SHARED_BINDINGS_ADCBUFFER_BUFFEREDINPUT_H__
diff --git a/shared-bindings/adcbuffer/__init__.c b/shared-bindings/adcbuffer/__init__.c
index 4d5fefc26e..447f01ea15 100644
--- a/shared-bindings/adcbuffer/__init__.c
+++ b/shared-bindings/adcbuffer/__init__.c
@@ -69,7 +69,6 @@
 STATIC const mp_rom_map_elem_t adcbuffer_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_adcbuffer) },
     { MP_ROM_QSTR(MP_QSTR_BufferedInput),   MP_ROM_PTR(&adcbuffer_bufferedinput_type) },
-    // #ifdef CIRCUITPY_BUFFEREDINPUT    #endif
 };
 
 STATIC MP_DEFINE_CONST_DICT(adcbuffer_module_globals, adcbuffer_module_globals_table);