Index: ELF/SymbolTable.h
===================================================================
--- ELF/SymbolTable.h
+++ ELF/SymbolTable.h
@@ -105,6 +105,8 @@
   struct SymIndex {
     int32_t Idx : 31;
     uint32_t Traced : 1;
+
+    SymIndex(int32_t Idx, bool Traced) : Idx(Idx), Traced(Traced) {}
   };
 
   // The order the global symbols are in is not defined. We can use an arbitrary
Index: ELF/SymbolTable.cpp
===================================================================
--- ELF/SymbolTable.cpp
+++ ELF/SymbolTable.cpp
@@ -240,13 +240,13 @@
     Name = Name.take_front(Pos);
 
   auto P = Symtab.insert(
-      {CachedHashStringRef(Name), SymIndex{(int)SymVector.size(), false}});
+      {CachedHashStringRef(Name), SymIndex((int)SymVector.size(), false)});
   SymIndex &V = P.first->second;
   bool IsNew = P.second;
 
   if (V.Idx == -1) {
     IsNew = true;
-    V = SymIndex{(int)SymVector.size(), true};
+    V = SymIndex((int)SymVector.size(), true);
   }
 
   Symbol *Sym;