diff --git a/src/comp/rustc.rc b/src/comp/rustc.rc
index 1527479252e..cc22fe8b22c 100644
--- a/src/comp/rustc.rc
+++ b/src/comp/rustc.rc
@@ -63,6 +63,11 @@ mod back {
 }
 
 mod metadata {
+    export tyencode;
+    export encoder;
+    export decoder;
+    export creader;
+
     mod defs;
     mod tyencode;
     mod tydecode;