diff --git a/lldb/include/lldb/Utility/ProcessStructReader.h b/lldb/include/lldb/Utility/ProcessStructReader.h
index ea1b5eca3c3a..7e58091ecded 100644
--- a/lldb/include/lldb/Utility/ProcessStructReader.h
+++ b/lldb/include/lldb/Utility/ProcessStructReader.h
@@ -63,7 +63,9 @@ namespace lldb_private {
                 // no support for things larger than a uint64_t (yet)
                 if (size > 8)
                     return;
-                m_fields[ConstString(name.c_str())] = FieldImpl{field_type,static_cast<size_t>(bit_offset/8),static_cast<size_t>(size)};
+                ConstString const_name = ConstString(name.c_str());
+                size_t byte_index = static_cast<size_t>(bit_offset / 8);
+                m_fields[const_name] = FieldImpl{field_type, byte_index, size};
             }
             size_t total_size = struct_type.GetByteSize();
             lldb::DataBufferSP buffer_sp(new DataBufferHeap(total_size,0));