diff --git a/src/google/protobuf/editions/codegen_tests/proto3_packed.proto b/src/google/protobuf/editions/codegen_tests/proto3_packed.proto
index ed7e38f404..3f511b540f 100644
--- a/src/google/protobuf/editions/codegen_tests/proto3_packed.proto
+++ b/src/google/protobuf/editions/codegen_tests/proto3_packed.proto
@@ -16,4 +16,5 @@ message Proto3Packed {
     int32 int32_field = 1;
   }
   repeated SubMessage sub_message_field = 3;
+  repeated int32 explicitly_packed = 4 [packed = true];
 }
diff --git a/src/google/protobuf/editions/golden/editions_transform_proto2.proto b/src/google/protobuf/editions/golden/editions_transform_proto2.proto
index 37ceb7bfdd..0e538701b0 100644
--- a/src/google/protobuf/editions/golden/editions_transform_proto2.proto
+++ b/src/google/protobuf/editions/golden/editions_transform_proto2.proto
@@ -14,6 +14,7 @@ edition = "2023";
 
 package protobuf_editions_test;
 
+import "net/proto/proto1_features.proto";
 import "third_party/java_src/protobuf/current/java/com/google/protobuf/java_features.proto";
 import "google/protobuf/cpp_features.proto";
 import "google/protobuf/editions/proto/editions_transform_proto3.proto";
@@ -78,7 +79,8 @@ message TestMessage {
   map<string, string> string_map_field = 7;
   repeated int32 int_field = 8;
   repeated int32 int_field_packed = 9 [
-    features.repeated_field_encoding = PACKED
+    features.repeated_field_encoding = PACKED,
+    features.(pb.proto1).legacy_packed = true
   ];
 
   repeated int32 int_field_unpacked = 10;
diff --git a/src/google/protobuf/editions/golden/editions_transform_proto3.proto b/src/google/protobuf/editions/golden/editions_transform_proto3.proto
index 80123f4e50..cbb91d0fc0 100644
--- a/src/google/protobuf/editions/golden/editions_transform_proto3.proto
+++ b/src/google/protobuf/editions/golden/editions_transform_proto3.proto
@@ -9,6 +9,8 @@ edition = "2023";
 
 package protobuf_editions_test;
 
+import "net/proto/proto1_features.proto";
+
 option features.field_presence = IMPLICIT;
 
 enum TestEnumProto3 {
@@ -20,7 +22,10 @@ message TestMessageProto3 {
   string string_field = 1;
   map<string, string> string_map_field = 4;
   repeated int32 int_field = 7;
-  repeated int32 int_field_packed = 8;
+  repeated int32 int_field_packed = 8 [
+    features.(pb.proto1).legacy_packed = true
+  ];
+
   repeated int32 int_field_unpacked = 9 [
     features.repeated_field_encoding = EXPANDED
   ];