diff --git a/compiler/optimizing/code_generator_arm64.h b/compiler/optimizing/code_generator_arm64.h
index a8a9802..6a52eec 100644
--- a/compiler/optimizing/code_generator_arm64.h
+++ b/compiler/optimizing/code_generator_arm64.h
@@ -264,6 +264,8 @@
  private:
   void GenerateClassInitializationCheck(SlowPathCodeARM64* slow_path,
                                         vixl::aarch64::Register class_reg);
+  void GenerateBitstringTypeCheckCompare(HTypeCheckInstruction* check,
+                                         vixl::aarch64::Register temp);
   void GenerateSuspendCheck(HSuspendCheck* instruction, HBasicBlock* successor);
   void HandleBinaryOp(HBinaryOperation* instr);