diff --git a/lens/base/identity.rkt b/lens/base/identity.rkt
index 4e1f329..2ce5710 100644
--- a/lens/base/identity.rkt
+++ b/lens/base/identity.rkt
@@ -6,7 +6,8 @@
   (require rackunit
            "view-set.rkt"))
 
-(provide identity-lens)
+(provide
+ (contract-out [identity-lens lens?]))
 
 
 (define (second-value _ v) v)