diff --git a/src/plugin.rs b/src/plugin.rs
index e0d53507..56e6af5d 100644
--- a/src/plugin.rs
+++ b/src/plugin.rs
@@ -1,5 +1,7 @@
 //! Module defining plugins in Rhai. Is exported for use by plugin authors.
 
+use crate::stdlib::boxed::Box;
+
 pub use crate::any::{Dynamic, Variant};
 pub use crate::fn_native::{CallableFunction, FnCallArgs, IteratorFn};
 pub use crate::parser::{