diff --git a/legacy/eina/src/include/eina_inlist.h b/legacy/eina/src/include/eina_inlist.h
index bedcc5f98b..4830b8578e 100644
--- a/legacy/eina/src/include/eina_inlist.h
+++ b/legacy/eina/src/include/eina_inlist.h
@@ -22,6 +22,7 @@
 #include "eina_types.h"
 #include "eina_iterator.h"
 #include "eina_accessor.h"
+#include <stddef.h>
 
 /**
  * @addtogroup Eina_Data_Types_Group Data Types