diff --git a/binary/checkers.c b/binary/checkers.c
index 4f077bc..60b2823 100644
--- a/binary/checkers.c
+++ b/binary/checkers.c
@@ -25,7 +25,6 @@ extern "C" {
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
-#include <stddef.h>
 #include <errno.h>
 
 #include "include/pmt.h"