diff --git a/src/MQUnifiedsensor.cpp b/src/MQUnifiedsensor.cpp
index 089bad9..10b31bb 100644
--- a/src/MQUnifiedsensor.cpp
+++ b/src/MQUnifiedsensor.cpp
@@ -1,5 +1,8 @@
 #include "MQUnifiedsensor.h"
 
+#define retries 2
+#define retry_interval 20
+
 MQUnifiedsensor::MQUnifiedsensor(String Placa, float Voltage_Resolution, int ADC_Bit_Resolution, int pin, String type) {
   this->_pin = pin;
   Placa.toCharArray(this->_placa, 20);
diff --git a/src/MQUnifiedsensor.h b/src/MQUnifiedsensor.h
index 6ed97b6..306e88e 100644
--- a/src/MQUnifiedsensor.h
+++ b/src/MQUnifiedsensor.h
@@ -6,10 +6,6 @@
 
 /***********************Software Related Macros************************************/
 
-#define ADC_RESOLUTION 10 // for 10bit analog to digital converter.
-#define retries 2
-#define retry_interval 20
-
 class MQUnifiedsensor
 {
   public: