diff --git a/build-constraints.yaml b/build-constraints.yaml
index 9d7f1ce8..a908a0cb 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2839,7 +2839,6 @@ expected-test-failures:
     - ListLike # No issue tracker, e-mail sent to maintainer
     - dbus # 0.10.12 No issue tracker, e-mail sent to maintainer
     - hspec-expectations-pretty-diff # GHC 8 issue not reported upstream since issue tracker disabled
-    - messagepack # 0.5.1 https://github.com/rodrigosetti/messagepack/issues/9
     - safecopy # time 1.6 https://github.com/acid-state/safecopy/issues/45
     - sourcemap # https://github.com/chrisdone/sourcemap/issues/3
     - swagger # GHC 8 bug? https://gitlab.com/twittner/swagger/issues/6