diff --git a/IR_config.cpp b/IR_config.cpp
index 9ddae25..7acf1bc 100644
--- a/IR_config.cpp
+++ b/IR_config.cpp
@@ -4,6 +4,7 @@ void IR_FOX::setPin(uint8_t pin){
     this->pin = pin;
     port = digitalPinToPort(pin);
     mask = digitalPinToBitMask(pin);
+    pinMode(pin, INPUT_PULLUP);
 }
 
 void IR_FOX::checkAddressRuleApply(uint16_t address, uint16_t id, bool &flag)