diff --git a/FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp b/FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
index 161130db7..7dce4c328 100644
--- a/FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
+++ b/FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
@@ -4671,7 +4671,7 @@ void OpDispatchBuilder::CMPXCHGPairOp(OpcodeArgs) {
   // This will write to memory! Careful!
   // Third operand must be a calculated guest memory address
 
-  OrderedNode *CASResult = _CASPair(Expected, Desired, Src1);
+  OrderedNode *CASResult = _CASPair(IR::SizeToOpSize(Size * 2), Expected, Desired, Src1);
 
   OrderedNode *Result_Lower = _ExtractElementPair(CASResult, 0);
   OrderedNode *Result_Upper = _ExtractElementPair(CASResult, 1);
diff --git a/FEXCore/include/FEXCore/IR/IREmitter.h b/FEXCore/include/FEXCore/IR/IREmitter.h
index 15c3e53cb..d24f8807a 100644
--- a/FEXCore/include/FEXCore/IR/IREmitter.h
+++ b/FEXCore/include/FEXCore/IR/IREmitter.h
@@ -112,9 +112,6 @@ friend class FEXCore::IR::PassManager;
   IRPair<IROp_CAS> _CAS(OrderedNode *_Expected, OrderedNode *_Desired, OrderedNode *_Addr) {
     return _CAS(static_cast<OpSize>(GetOpSize(_Expected)), _Expected, _Desired, _Addr);
   }
-  IRPair<IROp_CASPair> _CASPair(OrderedNode *_Expected, OrderedNode *_Desired, OrderedNode *_Addr) {
-    return _CASPair(static_cast<OpSize>(GetOpSize(_Expected)), _Expected, _Desired, _Addr);
-  }
   ///< ALU
   IRPair<IROp_Add> _Add(OrderedNode *_Src1, OrderedNode *_Src2) {
     return _Add(static_cast<OpSize>(std::max<uint8_t>(4, std::max(GetOpSize(_Src1), GetOpSize(_Src2)))), _Src1, _Src2);