diff --git a/compiler/optimizing/code_generator_x86.h b/compiler/optimizing/code_generator_x86.h
index faf3cf9..696d8d5 100644
--- a/compiler/optimizing/code_generator_x86.h
+++ b/compiler/optimizing/code_generator_x86.h
@@ -124,10 +124,16 @@
 #define DECLARE_VISIT_INSTRUCTION(name, super)     \
   void Visit##name(H##name* instr) OVERRIDE;
 
-  FOR_EACH_CONCRETE_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)
+  FOR_EACH_CONCRETE_INSTRUCTION_COMMON(DECLARE_VISIT_INSTRUCTION)
+  FOR_EACH_CONCRETE_INSTRUCTION_X86(DECLARE_VISIT_INSTRUCTION)
 
 #undef DECLARE_VISIT_INSTRUCTION
 
+  void VisitInstruction(HInstruction* instruction) OVERRIDE {
+    LOG(FATAL) << "Unreachable instruction " << instruction->DebugName()
+               << " (id " << instruction->GetId() << ")";
+  }
+
  private:
   void HandleBitwiseOperation(HBinaryOperation* instruction);
   void HandleInvoke(HInvoke* invoke);
@@ -148,10 +154,16 @@
 #define DECLARE_VISIT_INSTRUCTION(name, super)     \
   void Visit##name(H##name* instr) OVERRIDE;
 
-  FOR_EACH_CONCRETE_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)
+  FOR_EACH_CONCRETE_INSTRUCTION_COMMON(DECLARE_VISIT_INSTRUCTION)
+  FOR_EACH_CONCRETE_INSTRUCTION_X86(DECLARE_VISIT_INSTRUCTION)
 
 #undef DECLARE_VISIT_INSTRUCTION
 
+  void VisitInstruction(HInstruction* instruction) OVERRIDE {
+    LOG(FATAL) << "Unreachable instruction " << instruction->DebugName()
+               << " (id " << instruction->GetId() << ")";
+  }
+
   X86Assembler* GetAssembler() const { return assembler_; }
 
  private: