--- a/js/src/jit/none/MacroAssembler-none.h
+++ b/js/src/jit/none/MacroAssembler-none.h
@@ -80,16 +80,17 @@ static constexpr Register64 ReturnReg64(
 
 static constexpr Register ABINonArgReg0 = { Registers::invalid_reg };
 static constexpr Register ABINonArgReg1 = { Registers::invalid_reg };
 static constexpr Register ABINonArgReturnReg0 = { Registers::invalid_reg };
 static constexpr Register ABINonArgReturnReg1 = { Registers::invalid_reg };
 
 static constexpr Register WasmTableCallPtrReg = { Registers::invalid_reg };
 static constexpr Register WasmTableCallSigReg = { Registers::invalid_reg };
+static constexpr Register WasmTlsReg = { Registers::invalid_reg };
 
 static constexpr uint32_t ABIStackAlignment = 4;
 static constexpr uint32_t CodeAlignment = 4;
 static constexpr uint32_t JitStackAlignment = 8;
 static constexpr uint32_t JitStackValueAlignment = JitStackAlignment / sizeof(Value);
 
 static const Scale ScalePointer = TimesOne;