diff --git a/lib/vty.c b/lib/vty.c
index 9e0625e3cb..8d79a6b566 100644
--- a/lib/vty.c
+++ b/lib/vty.c
@@ -2227,7 +2227,7 @@ void
 vty_close (struct vty *vty)
 {
   int i;
-  bool was_stdio;
+  bool was_stdio = false;
 
   /* Cancel threads.*/
   if (vty->t_read)