diff --git a/src/vim.h b/src/vim.h
index 7560982..34a8650 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -2458,6 +2458,7 @@
 #define TFN_INT		1	/* internal function name OK */
 #define TFN_QUIET	2	/* no error messages */
 #define TFN_NO_AUTOLOAD	4	/* do not use script autoloading */
+#define TFN_NO_DEREF	8	/* do not dereference a Funcref */
 
 /* Values for get_lval() flags argument: */
 #define GLV_QUIET	TFN_QUIET	/* no error messages */