diff --git a/include/llvm/Target/MRegisterInfo.h b/include/llvm/Target/MRegisterInfo.h
index 08f76c4d353..cf877bfc2a2 100644
--- a/include/llvm/Target/MRegisterInfo.h
+++ b/include/llvm/Target/MRegisterInfo.h
@@ -562,7 +562,7 @@ public:
   }
 
   /// unfoldMemoryOperand - Separate a single instruction which folded a load or
-  /// a a store or a load and a store into two or more instruction. If this is
+  /// a store or a load and a store into two or more instruction. If this is
   /// possible, returns true as well as the new instructions by reference.
   virtual bool unfoldMemoryOperand(MachineFunction &MF, MachineInstr *MI,
                                 unsigned Reg, bool UnfoldLoad, bool UnfoldStore,