diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 3c0baf0..7b8046e 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -1624,6 +1624,7 @@
     }
    
   case ISD::PCMARKER:      return "PCMarker";
+  case ISD::READCYCLECOUNTER: return "ReadCycleCounter";
   case ISD::SRCVALUE:      return "SrcValue";
   case ISD::VALUETYPE:     return "ValueType";
   case ISD::EntryToken:    return "EntryToken";