Fix #1964
diff --git a/release-notes/VERSION-2.x b/release-notes/VERSION-2.x
index 6cf0538..05d9652 100644
--- a/release-notes/VERSION-2.x
+++ b/release-notes/VERSION-2.x
@@ -8,6 +8,9 @@
#1565: Deserialization failure with Polymorphism using JsonTypeInfo `defaultImpl`,
subtype as target
+#1964: Failed to specialize `Map` type during serialization where key type
+ incompatibility overidden via "raw" types
+ (reported by ptirador@github)
#1998: Removing "type" attribute with Mixin not taken in account if
using ObjectMapper.copy()
(reported by SBKila@github)