diff --git a/prospect/core.rkt b/prospect/core.rkt
index 1c8e052..f148510 100644
--- a/prospect/core.rkt
+++ b/prospect/core.rkt
@@ -28,6 +28,7 @@
 
          meta-label?
 
+         prepend-at-meta
          assert
          retract
          sub