diff --git a/sonoff/xsns_40_pn532_i2c.ino b/sonoff/xsns_40_pn532_i2c.ino
index 853faefef..1c4a193e1 100644
--- a/sonoff/xsns_40_pn532_i2c.ino
+++ b/sonoff/xsns_40_pn532_i2c.ino
@@ -236,7 +236,7 @@ bool PN532_SAMConfig(void)
     pn532_i2c_packetbuffer[0] = PN532_COMMAND_SAMCONFIGURATION;
     pn532_i2c_packetbuffer[1] = 0x01; // normal mode;
     pn532_i2c_packetbuffer[2] = 0x01; // timeout 50ms * 1 = 50ms
-    pn532_i2c_packetbuffer[3] = 0x01; // Disable IRQ pin
+    pn532_i2c_packetbuffer[3] = 0x00; // Disable IRQ pin
 
     if (PN532_writeCommand(pn532_i2c_packetbuffer, 4))
         return false;