Index: ELF/SymbolTable.h
===================================================================
--- ELF/SymbolTable.h
+++ ELF/SymbolTable.h
@@ -102,6 +102,7 @@
   std::map<std::string, SymbolBody *> getDemangledSyms();
 
   struct SymIndex {
+    SymIndex(int Idx, unsigned Traced) : Idx(Idx), Traced(Traced) {}
     int Idx : 31;
     unsigned Traced : 1;
   };
Index: ELF/SymbolTable.cpp
===================================================================
--- ELF/SymbolTable.cpp
+++ ELF/SymbolTable.cpp
@@ -174,13 +174,13 @@
 // Find an existing symbol or create and insert a new one.
 template <class ELFT>
 std::pair<Symbol *, bool> SymbolTable<ELFT>::insert(StringRef Name) {
-  auto P = Symtab.insert({Name, {(int)SymVector.size(), false}});
+  auto P = Symtab.insert({Name, SymIndex((int)SymVector.size(), false)});
   SymIndex &V = P.first->second;
   bool IsNew = P.second;
 
   if (V.Idx == -1) {
     IsNew = true;
-    V = {(int)SymVector.size(), true};
+    V = SymIndex((int)SymVector.size(), true);
   }
 
   Symbol *Sym;