diff --git a/src/scanner.h b/src/scanner.h
index e6193451..ac113682 100644
--- a/src/scanner.h
+++ b/src/scanner.h
@@ -4,6 +4,7 @@
  
 
 #include <stdlib.h>
+#include <stdint.h>
 #include <stdbool.h>
 
 #include "token_types.h"