diff --git a/include/llvm/DebugInfo/DWARF/DWARFSection.h b/include/llvm/DebugInfo/DWARF/DWARFSection.h
index 43df3b36809..3b3f9b2c4d0 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFSection.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFSection.h
@@ -19,10 +19,6 @@ struct DWARFSection {
   StringRef Data;
 };
 
-struct DWARFSectionMap final : public DWARFSection {
-  RelocAddrMap Relocs;
-};
-
 } // end namespace llvm
 
 #endif // LLVM_DEBUGINFO_DWARF_DWARFSECTION_H
diff --git a/lib/DebugInfo/DWARF/DWARFContext.cpp b/lib/DebugInfo/DWARF/DWARFContext.cpp
index 1b45ca9e20d..654fc0c10c4 100644
--- a/lib/DebugInfo/DWARF/DWARFContext.cpp
+++ b/lib/DebugInfo/DWARF/DWARFContext.cpp
@@ -916,6 +916,12 @@ ErrorPolicy DWARFContext::defaultErrorHandler(Error E) {
   return ErrorPolicy::Continue;
 }
 
+namespace {
+struct DWARFSectionMap final : public DWARFSection {
+  RelocAddrMap Relocs;
+};
+} // namespace
+
 class DWARFObjInMemory final : public DWARFObject {
   bool IsLittleEndian;
   uint8_t AddressSize;