diff --git a/compiler/knownfun.lisp b/compiler/knownfun.lisp
index 760ba65283e608dea177c1589ad60a81a4ef0a96..828e1c2ae12632389c1b8be8b208c317bb1a7781 100644
--- a/compiler/knownfun.lisp
+++ b/compiler/knownfun.lisp
@@ -16,6 +16,7 @@
 ;;;
 (in-package 'c)
 
+(export '(call unsave unwind any foldable flushable movable predicate))
 
 ;;;; IR1 boolean function attributes:
 ;;;