diff --git a/include/llvm/CodeGen/MachineInstr.h b/include/llvm/CodeGen/MachineInstr.h
index f4b1cba1be0..00cab22548c 100644
--- a/include/llvm/CodeGen/MachineInstr.h
+++ b/include/llvm/CodeGen/MachineInstr.h
@@ -349,7 +349,6 @@ class MachineInstr: public NonCopyable {      // Disable copy operations
   bool OperandsComplete() const;
 
 public:
-  MachineInstr(MachineOpCode Opcode);
   MachineInstr(MachineOpCode Opcode, unsigned numOperands);
 
   /// MachineInstr ctor - This constructor only does a _reserve_ of the
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index 295d607bede..e83ad798d5e 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -20,15 +20,6 @@ using std::cerr;
 //
 extern const TargetInstrDescriptor *TargetInstrDescriptors;
 
-// Constructor for instructions with fixed #operands (nearly all)
-MachineInstr::MachineInstr(MachineOpCode _opCode)
-  : opCode(_opCode),
-    operands(TargetInstrDescriptors[_opCode].numOperands, MachineOperand()),
-    numImplicitRefs(0)
-{
-  assert(TargetInstrDescriptors[_opCode].numOperands >= 0);
-}
-
 // Constructor for instructions with variable #operands
 MachineInstr::MachineInstr(MachineOpCode OpCode, unsigned  numOperands)
   : opCode(OpCode),