diff --git a/build-constraints.yaml b/build-constraints.yaml
index 65e2a8b2..ac76a63f 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1268,6 +1268,9 @@ expected-test-failures:
     # https://github.com/lymar/hastache/issues/47 GHC 7.10
     - hastache
 
+    # https://github.com/simonmar/alex/issues/62 GHC 7.10
+    - alex
+
     # https://github.com/kazu-yamamoto/http-date/issues/6 GHC 7.10
     - http-date