diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
--- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
@@ -1720,9 +1720,9 @@
       // binaries.
       dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] =
           clang_type.GetOpaqueQualType();
-      dwarf->GetForwardDeclClangTypeToDie()
-          [ClangUtil::RemoveFastQualifiers(clang_type).GetOpaqueQualType()] =
-          die.GetID();
+      dwarf->GetForwardDeclClangTypeToDie().try_emplace(
+          ClangUtil::RemoveFastQualifiers(clang_type).GetOpaqueQualType(),
+          *die.GetDIERef());
       m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true);
     }
   }
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
@@ -322,8 +322,7 @@
   typedef llvm::DenseMap<const DWARFDebugInfoEntry *,
                          lldb::opaque_compiler_type_t>
       DIEToClangType;
-  typedef llvm::DenseMap<lldb::opaque_compiler_type_t, lldb::user_id_t>
-      ClangTypeToDIE;
+  typedef llvm::DenseMap<lldb::opaque_compiler_type_t, DIERef> ClangTypeToDIE;
 
   DISALLOW_COPY_AND_ASSIGN(SymbolFileDWARF);