diff --git a/etc/bash_completion.d/vagrant b/etc/bash_completion.d/vagrant
index 50a4bf1..88ea37a 100644
--- a/etc/bash_completion.d/vagrant
+++ b/etc/bash_completion.d/vagrant
@@ -97,7 +97,7 @@ _vagrant() {
                 return 0
                 ;;
             "box")
-                box_commands="add help list remove repackage"
+                box_commands="add help list remove prune repackage"
                 COMPREPLY=($(compgen -W "${box_commands}" -- ${cur}))
                 return 0
                 ;;