diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 58bc96daf26..1788a6289ed 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2610,7 +2610,7 @@ void DwarfDebug::addDwarfTypeUnitType(DwarfCompileUnit &CU,
 }
 
 void DwarfDebug::attachLowHighPC(DwarfCompileUnit &Unit, DIE &D,
-                                 MCSymbol *Begin, MCSymbol *End) {
+                                 const MCSymbol *Begin, const MCSymbol *End) {
   assert(Begin && "Begin label should not be null!");
   assert(End && "End label should not be null!");
   assert(Begin->isDefined() && "Invalid starting label");
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index c0e7e439318..3528b2b8e33 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -562,8 +562,8 @@ class DwarfDebug : public AsmPrinterHandler {
 
   void attachRangesOrLowHighPC(DwarfCompileUnit &Unit, DIE &D,
                                const SmallVectorImpl<InsnRange> &Ranges);
-  void attachLowHighPC(DwarfCompileUnit &Unit, DIE &D, MCSymbol *Begin,
-                       MCSymbol *End);
+  void attachLowHighPC(DwarfCompileUnit &Unit, DIE &D, const MCSymbol *Begin,
+                       const MCSymbol *End);
 
 public:
   //===--------------------------------------------------------------------===//