diff --git a/src/knx/application_layer.cpp b/src/knx/application_layer.cpp
index f1b44ab..efe87b1 100644
--- a/src/knx/application_layer.cpp
+++ b/src/knx/application_layer.cpp
@@ -1148,10 +1148,12 @@ void ApplicationLayer::individualIndication(HopCountType hopType, Priority prior
             _bau.keyWriteAppLayerConfirm(priority, hopType, tsap, secCtrl, data[1]);
             break;
         case ADCRead:
+        {
             //Since we don't have an adc for bus voltage, we just send zero as readCount
             uint8_t channelNr = tsap & 0b111111;
             this->adcReadResponse(AckRequested, priority, hopType, tsap, secCtrl, channelNr, 0, 0);
             break;
+        }
         default:
             print("Individual-indication: unhandled APDU-Type: ");
             println(apdu.type());