diff --git a/llvm/lib/CodeGen/MachineOperand.cpp b/llvm/lib/CodeGen/MachineOperand.cpp
index b4bfa3f..9d0c93e 100644
--- a/llvm/lib/CodeGen/MachineOperand.cpp
+++ b/llvm/lib/CodeGen/MachineOperand.cpp
@@ -440,7 +440,7 @@
     OS << "<unknown>";
 }
 
-void MachineOperand::printSubregIdx(raw_ostream &OS, uint64_t Index,
+void MachineOperand::printSubRegIdx(raw_ostream &OS, uint64_t Index,
                                     const TargetRegisterInfo *TRI) {
   OS << "%subreg.";
   if (TRI)