diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index dd233eaa1bc..aeaa63f2af5 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -606,7 +606,8 @@ DIE *DwarfDebug::constructScopeDIE(CompileUnit *TheCU, LexicalScope *Scope) {
     std::pair<ImportedEntityMap::const_iterator,
               ImportedEntityMap::const_iterator> Range = std::equal_range(
         ScopesWithImportedEntities.begin(), ScopesWithImportedEntities.end(),
-        std::pair<const MDNode *, const MDNode *>(DS, 0), CompareFirst());
+        std::pair<const MDNode *, const MDNode *>(DS, (const MDNode*)0),
+        CompareFirst());
     if (Children.empty() && Range.first == Range.second)
       return NULL;
     ScopeDIE = constructLexicalScopeDIE(TheCU, Scope);