| Index: runtime/vm/disassembler_arm64.cc | 
| diff --git a/runtime/vm/disassembler_arm64.cc b/runtime/vm/disassembler_arm64.cc | 
| index e4142210a206bab0609c7fe7fed6040f62763fac..bf0787718f28639e8e1d616a963e2c553b89830d 100644 | 
| --- a/runtime/vm/disassembler_arm64.cc | 
| +++ b/runtime/vm/disassembler_arm64.cc | 
| @@ -10,6 +10,8 @@ | 
|  | 
| namespace dart { | 
|  | 
| +#ifndef PRODUCT | 
| + | 
| class ARM64Decoder : public ValueObject { | 
| public: | 
| ARM64Decoder(char* buffer, size_t buffer_size) | 
| @@ -1465,6 +1467,8 @@ void Disassembler::DecodeInstruction(char* hex_buffer, intptr_t hex_size, | 
| } | 
| } | 
|  | 
| +#endif  // !PRODUCT | 
| + | 
| }  // namespace dart | 
|  | 
| #endif  // defined TARGET_ARCH_ARM | 
|  |