diff --git a/src/vim.h b/src/vim.h
index f8090bf..25c9d12 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -2190,7 +2190,8 @@
 #define VV_TYPE_TYPEALIAS 107
 #define VV_TYPE_ENUM	  108
 #define VV_TYPE_ENUMVALUE 109
-#define VV_LEN		110	// number of v: vars
+#define VV_STACKTRACE	110
+#define VV_LEN		111	// number of v: vars
 
 // used for v_number in VAR_BOOL and VAR_SPECIAL
 #define VVAL_FALSE	0L	// VAR_BOOL