diff --git a/src/vim9.h b/src/vim9.h
index d2c23be..2ae3f42 100644
--- a/src/vim9.h
+++ b/src/vim9.h
@@ -725,3 +725,7 @@
 				    // lhs_name is not NULL
 };
 
+// flags for typval2type()
+#define TVTT_DO_MEMBER	    1
+#define TVTT_MORE_SPECIFIC  2	// get most specific type for member
+