diff --git a/llvm/unittests/DebugInfo/DWARF/DwarfGenerator.h b/llvm/unittests/DebugInfo/DWARF/DwarfGenerator.h
index e575af2c29ff..01f40e3855b8 100644
--- a/llvm/unittests/DebugInfo/DWARF/DwarfGenerator.h
+++ b/llvm/unittests/DebugInfo/DWARF/DwarfGenerator.h
@@ -205,7 +205,7 @@ private:
   void writeProloguePayload(const DWARFDebugLine::Prologue &Prologue,
                             AsmPrinter &Asm) const;
 
-  Generator &DG;
+  LLVM_ATTRIBUTE_UNUSED Generator &DG;
   llvm::Optional<DWARFDebugLine::Prologue> Prologue;
   std::vector<ValueAndLength> CustomPrologue;
   std::vector<ValueAndLength> Contents;