diff --git a/lib/CodeGen/MachineBasicBlock.cpp b/lib/CodeGen/MachineBasicBlock.cpp
index dc6a618..5ca18d0 100644
--- a/lib/CodeGen/MachineBasicBlock.cpp
+++ b/lib/CodeGen/MachineBasicBlock.cpp
@@ -146,7 +146,7 @@
                              const TargetRegisterInfo *TRI = 0) {
   if (!RegNo || TargetRegisterInfo::isPhysicalRegister(RegNo)) {
     if (TRI)
-      os << " %" << TRI->get(RegNo).Name;
+      os << " %" << TRI->get(RegNo).PrintableName;
     else
       os << " %mreg(" << RegNo << ")";
   } else