diff --git a/PN532.cpp b/PN532.cpp
index a2fe42f..eb49a61 100644
--- a/PN532.cpp
+++ b/PN532.cpp
@@ -692,7 +692,7 @@ uint8_t PN532::mifareultralight_WritePage (uint8_t page, uint8_t *buffer)
 /**************************************************************************/
 bool PN532::inDataExchange(uint8_t *send, uint8_t sendLength, uint8_t *response, uint8_t *responseLength)
 {
-    uint8_t i;
+    //uint8_t i;
 
     pn532_packetbuffer[0] = 0x40; // PN532_COMMAND_INDATAEXCHANGE;
     pn532_packetbuffer[1] = inListedTag;
@@ -876,7 +876,7 @@ int16_t PN532::inRelease(const uint8_t relevantTarget){
 
 uint8_t PN532::ntag21x_auth(const uint8_t *key)
 {
-    uint8_t i;
+    //uint8_t i;
 
     // Prepare the authentication command //
     pn532_packetbuffer[0] = 0x42;