diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 1284d1c9220a..1eb88b9178d4 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1066,7 +1066,7 @@ void DwarfDebug::endModule() {
 }
 
 // Find abstract variable, if any, associated with Var.
-DbgVariable *DwarfDebug::getExistingAbstractVariable(DIVariable &DV,
+DbgVariable *DwarfDebug::getExistingAbstractVariable(const DIVariable &DV,
                                                      DIVariable &Cleansed) {
   LLVMContext &Ctx = DV->getContext();
   // More then one inlined variable corresponds to one abstract variable.
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
index fcc9a7c80dc3..88b8a674b3e1 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -344,7 +344,7 @@ class DwarfDebug : public AsmPrinterHandler {
   }
 
   /// \brief Find abstract variable associated with Var.
-  DbgVariable *getExistingAbstractVariable(DIVariable &DV,
+  DbgVariable *getExistingAbstractVariable(const DIVariable &DV,
                                            DIVariable &Cleansed);
   DbgVariable *createAbstractVariable(DIVariable &DV, LexicalScope *Scope);
   DbgVariable *getOrCreateAbstractVariable(DIVariable &Var,