diff --git a/build-constraints.yaml b/build-constraints.yaml
index 6cd6e89a..9e4cef3a 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2996,6 +2996,9 @@ packages:
         []
         # - HDBC-mysql # GHC 8.2.1
 
+    "Tony Morris <haskell@tmorris.net> @tonymorris":
+        - validation
+
     "Tony Day <tonyday567@gmail.com> @tonyday567":
         - numhask
         - numhask-range