diff --git a/llvm/lib/BinaryFormat/Dwarf.cpp b/llvm/lib/BinaryFormat/Dwarf.cpp
index dd1ecea1..a2e86c7 100644
--- a/llvm/lib/BinaryFormat/Dwarf.cpp
+++ b/llvm/lib/BinaryFormat/Dwarf.cpp
@@ -564,6 +564,8 @@
     return InlineCodeString(Val);
   case DW_AT_ordering:
     return ArrayOrderString(Val);
+  case DW_AT_APPLE_runtime_class:
+    return LanguageString(Val);
   }
 
   return StringRef();