diff --git a/FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp b/FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
index b716b2e8d..1caf079f2 100644
--- a/FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
+++ b/FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
@@ -4993,8 +4993,7 @@ void OpDispatchBuilder::CLZeroOp(OpcodeArgs) {
     UnimplementedOp(Op);
     return;
   }
-  Ref DestMem = LoadSourceGPR(Op, Op->Src[0], Op->Flags, {.LoadData = false});
-  _CacheLineZero(DestMem);
+  _CacheLineZero(LoadGPRRegister(X86State::REG_RAX));
 }
 
 void OpDispatchBuilder::Prefetch(OpcodeArgs, bool ForStore, bool Stream, uint8_t Level) {
diff --git a/FEXCore/Source/Interface/Core/X86Tables/SecondaryModRMTables.cpp b/FEXCore/Source/Interface/Core/X86Tables/SecondaryModRMTables.cpp
index 5d645b055..48417f9ff 100644
--- a/FEXCore/Source/Interface/Core/X86Tables/SecondaryModRMTables.cpp
+++ b/FEXCore/Source/Interface/Core/X86Tables/SecondaryModRMTables.cpp
@@ -50,7 +50,7 @@ constexpr std::array<X86InstInfo, MAX_SECOND_MODRM_TABLE_SIZE> SecondModRMTableO
     {((3 << 3) | 1), 1, X86InstInfo{"RDTSCP",   TYPE_INST,    FLAGS_NONE, 0}},
     {((3 << 3) | 2), 1, X86InstInfo{"MONITORX", TYPE_PRIV,    FLAGS_NONE, 0}},
     {((3 << 3) | 3), 1, X86InstInfo{"MWAITX",   TYPE_PRIV,    FLAGS_NONE, 0}},
-    {((3 << 3) | 4), 1, X86InstInfo{"CLZERO",   TYPE_INST,    GenFlagsSameSize(SIZE_64BITDEF) | FLAGS_SF_SRC_RAX | FLAGS_DEBUG_MEM_ACCESS, 0}},
+    {((3 << 3) | 4), 1, X86InstInfo{"CLZERO",   TYPE_INST,    GenFlagsSameSize(SIZE_64BITDEF) | FLAGS_DEBUG_MEM_ACCESS, 0}},
     {((3 << 3) | 5), 1, X86InstInfo{"",         TYPE_INVALID, FLAGS_NONE, 0}},
     {((3 << 3) | 6), 1, X86InstInfo{"",         TYPE_INVALID, FLAGS_NONE, 0}},
     {((3 << 3) | 7), 1, X86InstInfo{"",         TYPE_INVALID, FLAGS_NONE, 0}},