diff --git a/src/AudioAnalog/AnalogAudioESP32V1.h b/src/AudioAnalog/AnalogAudioESP32V1.h
index 007d0ba606..0600d3cb68 100644
--- a/src/AudioAnalog/AnalogAudioESP32V1.h
+++ b/src/AudioAnalog/AnalogAudioESP32V1.h
@@ -147,7 +147,7 @@ class AnalogDriverESP32V1 : public AnalogDriverBase {
         if(adc_continuous_read(self->adc_handle, dest, samples, &result, self->timeout)== ESP_OK) {
           // convert unsigned 8 bits to signed 16 bits;
           int16_t* data16 = (int16_t*)dest;
-          for (int j=samples-1;j>=0;j--){
+          for (int j = result-1; j>=0; j--){
             data16[j] = (static_cast<int16_t>(dest[8]) - 128) * 256;
           }
         } else {