diff --git a/llvm/lib/Target/Alpha/AlphaRegisterInfo.cpp b/llvm/lib/Target/Alpha/AlphaRegisterInfo.cpp
index 7667fd831d1aac113ef9b17076d2d5612a7a6cb5..53a464d3e46bd9819a568f110552571324f6b5fa 100644
--- a/llvm/lib/Target/Alpha/AlphaRegisterInfo.cpp
+++ b/llvm/lib/Target/Alpha/AlphaRegisterInfo.cpp
@@ -69,6 +69,7 @@ const unsigned* AlphaRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF)
 BitVector AlphaRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
   BitVector Reserved(getNumRegs());
   Reserved.set(Alpha::R15);
+  Reserved.set(Alpha::R29);
   Reserved.set(Alpha::R30);
   Reserved.set(Alpha::R31);
   return Reserved;