diff --git a/endian.hpp b/endian.hpp
index 2b5adcaa..0e8aa480 100644
--- a/endian.hpp
+++ b/endian.hpp
@@ -11,11 +11,13 @@
 #include "std.hpp"
 #include "types/bits.hpp"
 
-#include <cstdint>
-#include <cstring>
+#include <compare>
 #include <iosfwd>
 #include <type_traits>
 
+#include <cstdint>
+#include <cstring>
+
 
 namespace cruft {
     //-------------------------------------------------------------------------