diff --git a/Go2GenericsFeedback.md b/Go2GenericsFeedback.md
index 4c1bccd3..6e54e194 100644
--- a/Go2GenericsFeedback.md
+++ b/Go2GenericsFeedback.md
@@ -19,6 +19,8 @@ As the amount of feedback grows, please feel free to organize or reorganize this
 
 ## Supplemental (supporting with modifications)
 
+- Chris Siebenmann "[Go 2 Generics: Contracts are too clever](https://utcc.utoronto.ca/~cks/space/blog/programming/Go2ContractsTooClever)", November 2018
+
 - alanfo, "[Proposed changes to the Go draft generics design in the light of feedback received](https://gist.github.com/alanfo/72f07362d687f625a958bde1808e0c87)", October 2018
 
 - Andy Balholm "[Enumerated and structural contracts](https://gist.github.com/andybalholm/8165da83c10a48e56590c96542e93ff2)", October 2018