diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -4547,8 +4547,9 @@
   }
 
   // Create the new alias itself, but don't set a name yet.
+  unsigned AS = cast<llvm::PointerType>(Aliasee->getType())->getAddressSpace();
   auto *GA =
-      llvm::GlobalAlias::create(DeclTy, 0, LT, "", Aliasee, &getModule());
+      llvm::GlobalAlias::create(DeclTy, AS, LT, "", Aliasee, &getModule());
 
   if (Entry) {
     if (GA->getAliasee() == Entry) {