Fix #1178
diff --git a/release-notes/VERSION b/release-notes/VERSION
index c21f965..438b5eb 100644
--- a/release-notes/VERSION
+++ b/release-notes/VERSION
@@ -6,6 +6,7 @@
 
 2.7.4 (not yet released)
 
+#1178: `@JsonSerialize(contentAs=superType)` behavior disallowed in 2.7
 - Improve handling of custom content (de)serializers for `AtomicReference`
 
 2.7.3 (16-Mar-2016)