diff --git a/src/mac/LoRaMac.c b/src/mac/LoRaMac.c
index 537e7602c..a568eb723 100644
--- a/src/mac/LoRaMac.c
+++ b/src/mac/LoRaMac.c
@@ -1189,7 +1189,12 @@ static void ProcessRadioRxDone( void )
             MacCtx.McpsConfirm.Status = LORAMAC_EVENT_INFO_STATUS_OK;
             MacCtx.McpsConfirm.AckReceived = macMsgData.FHDR.FCtrl.Bits.Ack;
 
-            MacCtx.NvmCtx->AdrAckCounter = 0;
+            // Reset ADR ACK Counter only, when RX1 or RX2 slot
+            if( ( MacCtx.McpsIndication.RxSlot == RX_SLOT_WIN_1 ) ||
+                ( MacCtx.McpsIndication.RxSlot == RX_SLOT_WIN_2 ) )
+            {
+                MacCtx.NvmCtx->AdrAckCounter = 0;
+            }
 
             // MCPS Indication and ack requested handling
             if( multicast == 1 )