diff --git a/lldb/source/Plugins/ObjectFile/Minidump/MinidumpFileBuilder.cpp b/lldb/source/Plugins/ObjectFile/Minidump/MinidumpFileBuilder.cpp
index 3f1e25f730a18..f6c16b6e3d96a 100644
--- a/lldb/source/Plugins/ObjectFile/Minidump/MinidumpFileBuilder.cpp
+++ b/lldb/source/Plugins/ObjectFile/Minidump/MinidumpFileBuilder.cpp
@@ -853,7 +853,7 @@ Status MinidumpFileBuilder::AddMemoryList() {
   uint64_t total_size = GetCurrentDataEndOffset();
   auto iterator = all_core_memory_vec.begin();
   while (iterator != all_core_memory_vec.end()) {
-    if (m_saved_stack_ranges.count(iterator->range.start()) > 0) {
+    if (m_thread_by_range_end.count(iterator->range.end()) > 0) {
       // We don't save stacks twice.
       ranges_32.push_back(*iterator);
       total_size +=
diff --git a/lldb/source/Plugins/ObjectFile/Minidump/MinidumpFileBuilder.h b/lldb/source/Plugins/ObjectFile/Minidump/MinidumpFileBuilder.h
index d5eac9015ac42..a4240f871c8a2 100644
--- a/lldb/source/Plugins/ObjectFile/Minidump/MinidumpFileBuilder.h
+++ b/lldb/source/Plugins/ObjectFile/Minidump/MinidumpFileBuilder.h
@@ -172,7 +172,6 @@ class MinidumpFileBuilder {
   // to duplicate it in the exception data.
   std::unordered_map<lldb::tid_t, llvm::minidump::LocationDescriptor>
       m_tid_to_reg_ctx;
-  std::unordered_set<lldb::addr_t> m_saved_stack_ranges;
   lldb::FileUP m_core_file;
   lldb_private::SaveCoreOptions m_save_core_options;
 };