diff --git a/vndk/tools/header-checker/src/repr/abi_diff_helpers.cpp b/vndk/tools/header-checker/src/repr/abi_diff_helpers.cpp
index f50d5d559..9e4c578e6 100644
--- a/vndk/tools/header-checker/src/repr/abi_diff_helpers.cpp
+++ b/vndk/tools/header-checker/src/repr/abi_diff_helpers.cpp
@@ -204,6 +204,7 @@ DiffStatus AbiDiffHelper::CompareEnumTypes(
   }
   auto enum_type_diff_ir = std::make_unique<EnumTypeDiffIR>();
   enum_type_diff_ir->SetName(old_type->GetName());
+  enum_type_diff_ir->SetLinkerSetKey(old_type->GetLinkerSetKey());
   const std::string &old_underlying_type =
       ConvertTypeIdToString(old_types_, old_type->GetUnderlyingType());
   const std::string &new_underlying_type =
@@ -555,6 +556,7 @@ DiffStatus AbiDiffHelper::CompareRecordTypes(
   }
   DiffStatus final_diff_status = DiffStatus::no_diff;
   record_type_diff_ir->SetName(old_type->GetName());
+  record_type_diff_ir->SetLinkerSetKey(old_type->GetLinkerSetKey());
   if (IsAccessDownGraded(old_type->GetAccess(), new_type->GetAccess())) {
     final_diff_status = DiffStatus::indirect_diff;
     record_type_diff_ir->SetAccessDiff(
diff --git a/vndk/tools/header-checker/src/repr/ir_diff_representation.h b/vndk/tools/header-checker/src/repr/ir_diff_representation.h
index 2ec4c0def..85c903ec9 100644
--- a/vndk/tools/header-checker/src/repr/ir_diff_representation.h
+++ b/vndk/tools/header-checker/src/repr/ir_diff_representation.h
@@ -190,6 +190,10 @@ class RecordTypeDiffIR : public DiffMessageIR {
     base_specifier_diffs_ = std::move(base_diffs);
   }
 
+  void SetLinkerSetKey(std::string linker_set_key) {
+    linker_set_key_ = std::move(linker_set_key);
+  }
+
   bool DiffExists() const {
     return (type_diff_ != nullptr) || (vtable_diffs_ != nullptr) ||
         (fields_removed_.size() != 0) || (field_diffs_.size() != 0) ||
@@ -208,6 +212,8 @@ class RecordTypeDiffIR : public DiffMessageIR {
     return base_specifier_diffs_.get();
   }
 
+  const std::string &GetLinkerSetKey() const { return linker_set_key_; }
+
  protected:
   // optional implemented with vector / std::unique_ptr.
   std::unique_ptr<TypeDiffIR> type_diff_;
@@ -217,8 +223,7 @@ class RecordTypeDiffIR : public DiffMessageIR {
   std::vector<const RecordFieldIR *> fields_added_;
   std::unique_ptr<AccessSpecifierDiffIR> access_diff_;
   std::unique_ptr<CXXBaseSpecifierDiffIR> base_specifier_diffs_;
-  // Template Diffs are not needed since they will show up in the linker set
-  // key.
+  std::string linker_set_key_;
 };
 
 class EnumFieldDiffIR {
@@ -274,6 +279,12 @@ class EnumTypeDiffIR : public DiffMessageIR {
     return underlying_type_diff_.get();
   }
 
+  void SetLinkerSetKey(std::string linker_set_key) {
+    linker_set_key_ = std::move(linker_set_key);
+  }
+
+  const std::string &GetLinkerSetKey() const { return linker_set_key_; }
+
   bool IsExtended() const {
     if (fields_removed_.size() == 0 && fields_diff_.size() == 0 &&
         fields_added_.size() != 0) {
@@ -300,8 +311,7 @@ class EnumTypeDiffIR : public DiffMessageIR {
   std::vector<const EnumFieldIR *> fields_removed_;
   std::vector<const EnumFieldIR *> fields_added_;
   std::vector<EnumFieldDiffIR> fields_diff_;
-  // Modifiable to allow implicit construction.
-  std::string name_;
+  std::string linker_set_key_;
 };
 
 class GlobalVarDiffIR : public DiffMessageIR {
diff --git a/vndk/tools/header-checker/src/repr/protobuf/converter.cpp b/vndk/tools/header-checker/src/repr/protobuf/converter.cpp
index 0ec9ab729..c418d80c1 100644
--- a/vndk/tools/header-checker/src/repr/protobuf/converter.cpp
+++ b/vndk/tools/header-checker/src/repr/protobuf/converter.cpp
@@ -138,8 +138,10 @@ abi_diff::RecordTypeDiff IRDiffToProtobufConverter::ConvertRecordTypeDiffIR(
     const RecordTypeDiffIR *record_type_diff_ir) {
   abi_diff::RecordTypeDiff record_type_diff_protobuf;
   record_type_diff_protobuf.set_name(record_type_diff_ir->GetName());
-  const TypeDiffIR *type_diff_ir = record_type_diff_ir->GetTypeDiff();
+  record_type_diff_protobuf.set_linker_set_key(
+      record_type_diff_ir->GetLinkerSetKey());
   // If a type_info diff exists
+  const TypeDiffIR *type_diff_ir = record_type_diff_ir->GetTypeDiff();
   if (type_diff_ir != nullptr) {
     abi_diff::TypeInfoDiff *type_info_diff =
         record_type_diff_protobuf.mutable_type_info_diff();
@@ -230,6 +232,8 @@ abi_diff::EnumTypeDiff IRDiffToProtobufConverter::ConvertEnumTypeDiffIR(
     const EnumTypeDiffIR *enum_type_diff_ir) {
   abi_diff::EnumTypeDiff enum_type_diff_protobuf;
   enum_type_diff_protobuf.set_name(enum_type_diff_ir->GetName());
+  enum_type_diff_protobuf.set_linker_set_key(
+      enum_type_diff_ir->GetLinkerSetKey());
   const std::pair<std::string, std::string> *underlying_type_diff =
       enum_type_diff_ir->GetUnderlyingTypeDiff();
   if ((underlying_type_diff != nullptr &&
diff --git a/vndk/tools/header-checker/src/repr/protobuf/proto/abi_diff.proto b/vndk/tools/header-checker/src/repr/protobuf/proto/abi_diff.proto
index 03f8ebe4b..90a1096e4 100644
--- a/vndk/tools/header-checker/src/repr/protobuf/proto/abi_diff.proto
+++ b/vndk/tools/header-checker/src/repr/protobuf/proto/abi_diff.proto
@@ -30,6 +30,7 @@ message CXXBaseSpecifierDiff {
 }
 
 message RecordTypeDiff {
+  // Template diffs are not needed since they have different linker set keys.
   optional string name = 1;
   optional string type_stack = 2;
   optional TypeInfoDiff type_info_diff = 3;
@@ -38,6 +39,7 @@ message RecordTypeDiff {
   repeated RecordFieldDeclDiff fields_diff = 6;
   optional CXXBaseSpecifierDiff bases_diff = 7;
   optional VTableLayoutDiff vtable_layout_diff = 8;
+  optional string linker_set_key = 9;
 }
 
 message UnderlyingTypeDiff {
@@ -57,6 +59,7 @@ message EnumTypeDiff {
   optional UnderlyingTypeDiff underlying_type_diff = 4;
   repeated abi_dump.EnumFieldDecl fields_added = 5;
   repeated abi_dump.EnumFieldDecl fields_removed = 6;
+  optional string linker_set_key = 7;
 }
 
 message FunctionDeclDiff {