diff --git a/Include/auROXTL/AU_MACROS.hpp b/Include/auROXTL/AU_MACROS.hpp
index 7dd55df..baad27a 100644
--- a/Include/auROXTL/AU_MACROS.hpp
+++ b/Include/auROXTL/AU_MACROS.hpp
@@ -253,8 +253,10 @@
 
 #if defined(AU_LANG_CPP_20_)
     #define AU_BIT_FIELD_AFTER_20(n) : n
+    #define AU_BIT_FIELD_INIT_AFTER_20(n) { n }
 #else
     #define AU_BIT_FIELD_AFTER_20(n)
+    #define AU_BIT_FIELD_INIT_AFTER_20(n)
 #endif
 
 #if defined(AU_LANG_CPP_20_)