diff --git a/build-constraints.yaml b/build-constraints.yaml
index 233ef756..74acaff8 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -813,11 +813,7 @@ packages:
         - pcre-heavy
 
     "Francesco Mazzoli f@mazzo.li @bitonic":
-        []
-        # Temporarily blocked due to:
-        # https://github.com/fpco/stackage/issues/509
-        # - language-c-quote
-
+        - language-c-quote
 
     "Sönke Hahn soenkehahn@gmail.com @soenkehahn":
         - getopt-generics
@@ -1179,6 +1175,9 @@ skipped-tests:
     - Cabal
     - MissingH
 
+    # Upper bound on src-log, see: https://github.com/fpco/stackage/issues/509
+    - language-c-quote
+
 # Tests which we should build and run, but which are expected to fail. We
 # should not fail a build based on a test failure for one of these packages.
 expected-test-failures: