diff --git a/build-constraints.yaml b/build-constraints.yaml
index a96152a3..8320d603 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -998,7 +998,7 @@ packages:
         - kmeans
         # Not compatible with GHC 7.10.2 (yes, it's a regression in GHC)
         # - boolsimplifier
-        # - cubicspline https://github.com/fpco/stackage/issues/899
+        - cubicspline
         - maximal-cliques
 
     "Alexander Bondarenko <aenor.realm@gmail.com> @wiz":