diff --git a/lib/Target/PowerPC/PPCRegisterInfo.cpp b/lib/Target/PowerPC/PPCRegisterInfo.cpp
index a21abe5810c..28ac7fdabe1 100644
--- a/lib/Target/PowerPC/PPCRegisterInfo.cpp
+++ b/lib/Target/PowerPC/PPCRegisterInfo.cpp
@@ -46,6 +46,7 @@ using namespace llvm;
 unsigned PPCRegisterInfo::getRegisterNumbering(unsigned RegEnum) {
   using namespace PPC;
   switch (RegEnum) {
+  case 0: return 0;
   case R0 :  case X0 :  case F0 :  case V0 : case CR0:  return  0;
   case R1 :  case X1 :  case F1 :  case V1 : case CR1:  return  1;
   case R2 :  case X2 :  case F2 :  case V2 : case CR2:  return  2;