diff --git a/build-constraints.yaml b/build-constraints.yaml
index d43abf64..7ef64f56 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3183,7 +3183,7 @@ packages:
         - optparse-generic < 1.2
 
         # https://github.com/fpco/stackage/issues/2516
-        ghc-typelits-knownnat <0.3
+        - ghc-typelits-knownnat <0.3
 
 # end of packages