diff --git a/llvm/lib/TextAPI/MachO/ArchitectureSet.cpp b/llvm/lib/TextAPI/MachO/ArchitectureSet.cpp
index c589671..a05d3eb 100644
--- a/llvm/lib/TextAPI/MachO/ArchitectureSet.cpp
+++ b/llvm/lib/TextAPI/MachO/ArchitectureSet.cpp
@@ -40,7 +40,7 @@
   std::string result;
   auto size = count();
   for (auto arch : *this) {
-    result.append(getArchitectureName(arch));
+    result.append(std::string(getArchitectureName(arch)));
     size -= 1;
     if (size)
       result.append(" ");