diff --git a/lib/runtime/src/export.rs b/lib/runtime/src/export.rs
index 56e256bf48..588523e127 100644
--- a/lib/runtime/src/export.rs
+++ b/lib/runtime/src/export.rs
@@ -6,6 +6,7 @@ use vmcontext::{
 use wasmtime_environ::{MemoryPlan, TablePlan};
 
 /// The value of an export passed from one instance to another.
+#[derive(Debug)]
 pub enum Export {
     /// A function export value.
     Function {