diff --git a/include/cstd.h b/include/cstd.h
index 0ffe6c3d5..707f74157 100644
--- a/include/cstd.h
+++ b/include/cstd.h
@@ -50,7 +50,6 @@
  *
  */
 
-#include <stddef.h>
 #include <stdio.h>
 #include <string.h>
 #include <signal.h>