diff --git a/sys/src/cmd/vt/main.c b/sys/src/cmd/vt/main.c
index f8983cb..ca4e402 100644
--- a/sys/src/cmd/vt/main.c
+++ b/sys/src/cmd/vt/main.c
@@ -1,5 +1,6 @@
 #include <u.h>
 #include <lib9.h>
+#include <envvars.h>
 #include <draw.h>
 
 #include "cons.h"