diff --git a/ghc/lib/std/PrelGHC.hi-boot b/ghc/lib/std/PrelGHC.hi-boot
index fa1f8d092df239efd2279a25a1198c7b6f5865c0..67d494fa884a490f4953e3557bd91d7e24d108eb 100644
--- a/ghc/lib/std/PrelGHC.hi-boot
+++ b/ghc/lib/std/PrelGHC.hi-boot
@@ -18,6 +18,10 @@ __export PrelGHC
 -- Magical assert thingy
   assert
 
+  -- constructor tags
+  tagToEnumzh
+  dataToTagzh
+
   -- I/O primitives
   RealWorld
   realWorldzh