diff --git a/src/MFRC522.h b/src/MFRC522.h
index 402ce59..09c72fc 100644
--- a/src/MFRC522.h
+++ b/src/MFRC522.h
@@ -75,9 +75,11 @@
 #ifndef MFRC522_h
 #define MFRC522_h
 
+// Enable integer limits
+#define __STDC_LIMIT_MACROS
+#include <stdint.h>
 #include <Arduino.h>
 #include <SPI.h>
-#include <stdint.h>
 
 #define MFRC522_SPICLOCK SPI_CLOCK_DIV4			// MFRC522 accept upto 10MHz