diff --git a/External/FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp b/External/FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
index 7c00ed50b..d2f2a5355 100644
--- a/External/FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
+++ b/External/FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
@@ -5860,6 +5860,8 @@ void OpDispatchBuilder::InstallHostSpecificOpcodeHandlers() {
     {OPD(1, 0b10, 0x58), 1, &OpDispatchBuilder::AVXVectorScalarALUOp<IR::OP_VFADD, 4>},
     {OPD(1, 0b11, 0x58), 1, &OpDispatchBuilder::AVXVectorScalarALUOp<IR::OP_VFADD, 8>},
 
+    {OPD(1, 0b01, 0x64), 1, &OpDispatchBuilder::AVXVectorALUOp<IR::OP_VCMPGT, 1>},
+
     {OPD(1, 0b01, 0x6E), 1, &OpDispatchBuilder::MOVBetweenGPR_FPR},
 
     {OPD(1, 0b01, 0x6F), 1, &OpDispatchBuilder::VMOVAPS_VMOVAPD_Op},
diff --git a/External/FEXCore/Source/Interface/Core/OpcodeDispatcher/Vector.cpp b/External/FEXCore/Source/Interface/Core/OpcodeDispatcher/Vector.cpp
index f328f6b66..89ffb173f 100644
--- a/External/FEXCore/Source/Interface/Core/OpcodeDispatcher/Vector.cpp
+++ b/External/FEXCore/Source/Interface/Core/OpcodeDispatcher/Vector.cpp
@@ -421,6 +421,9 @@ void OpDispatchBuilder::AVXVectorALUOp<IR::OP_VADD, 4>(OpcodeArgs);
 template
 void OpDispatchBuilder::AVXVectorALUOp<IR::OP_VADD, 8>(OpcodeArgs);
 
+template
+void OpDispatchBuilder::AVXVectorALUOp<IR::OP_VCMPGT, 1>(OpcodeArgs);
+
 template
 void OpDispatchBuilder::AVXVectorALUOp<IR::OP_VFADD, 4>(OpcodeArgs);
 template
diff --git a/External/FEXCore/Source/Interface/Core/X86Tables/VEXTables.cpp b/External/FEXCore/Source/Interface/Core/X86Tables/VEXTables.cpp
index bda58c550..346ae91ca 100644
--- a/External/FEXCore/Source/Interface/Core/X86Tables/VEXTables.cpp
+++ b/External/FEXCore/Source/Interface/Core/X86Tables/VEXTables.cpp
@@ -78,7 +78,7 @@ void InitializeVEXTables() {
     {OPD(1, 0b01, 0x61), 1, X86InstInfo{"VPUNPCKLWD", TYPE_UNDEC, FLAGS_NONE, 0, nullptr}},
     {OPD(1, 0b01, 0x62), 1, X86InstInfo{"VPUNPCKLDQ", TYPE_UNDEC, FLAGS_NONE, 0, nullptr}},
     {OPD(1, 0b01, 0x63), 1, X86InstInfo{"VPACKSSWB",  TYPE_UNDEC, FLAGS_NONE, 0, nullptr}},
-    {OPD(1, 0b01, 0x64), 1, X86InstInfo{"VPCMPGTB",   TYPE_INST, FLAGS_MODRM | FLAGS_XMM_FLAGS, 0, nullptr}},
+    {OPD(1, 0b01, 0x64), 1, X86InstInfo{"VPCMPGTB",   TYPE_INST, GenFlagsSameSize(SIZE_128BIT) | FLAGS_MODRM | FLAGS_VEX_1ST_SRC | FLAGS_XMM_FLAGS, 0, nullptr}},
     {OPD(1, 0b01, 0x65), 1, X86InstInfo{"VPVMPGTW",   TYPE_INST, FLAGS_MODRM | FLAGS_XMM_FLAGS, 0, nullptr}},
     {OPD(1, 0b01, 0x66), 1, X86InstInfo{"VPVMPGTD",   TYPE_INST, FLAGS_MODRM | FLAGS_XMM_FLAGS, 0, nullptr}},
     {OPD(1, 0b01, 0x67), 1, X86InstInfo{"VPACKUSWB",  TYPE_UNDEC, FLAGS_NONE, 0, nullptr}},
diff --git a/unittests/ASM/VEX/vpcmpgtb.asm b/unittests/ASM/VEX/vpcmpgtb.asm
new file mode 100644
index 000000000..2889e709c
--- /dev/null
+++ b/unittests/ASM/VEX/vpcmpgtb.asm
@@ -0,0 +1,43 @@
+%ifdef CONFIG
+{
+  "HostFeatures": ["AVX"],
+  "RegData": {
+    "XMM0": ["0x7172737475767778", "0x4142434445464748", "0x7172737475767778", "0x4142434445464748"],
+    "XMM1": ["0x6162636465666768", "0x5152535455565758", "0x6162636465666768", "0x5152535455565758"],
+    "XMM2": ["0xFFFFFFFFFFFFFFFF", "0x0000000000000000", "0xFFFFFFFFFFFFFFFF", "0x0000000000000000"],
+    "XMM3": ["0xFFFFFFFFFFFFFFFF", "0x0000000000000000", "0x0000000000000000", "0x0000000000000000"],
+    "XMM4": ["0xFFFFFFFFFFFFFFFF", "0x0000000000000000", "0xFFFFFFFFFFFFFFFF", "0x0000000000000000"],
+    "XMM5": ["0xFFFFFFFFFFFFFFFF", "0x0000000000000000", "0x0000000000000000", "0x0000000000000000"]
+  },
+  "MemoryRegions": {
+    "0x100000000": "4096"
+  }
+}
+%endif
+
+lea rdx, [rel .data]
+
+vmovapd ymm0, [rdx + 32 * 0]
+vmovapd ymm1, [rdx + 32 * 1]
+
+; Register only
+vpcmpgtb ymm2, ymm0, ymm1
+vpcmpgtb xmm3, xmm0, xmm1
+
+; Memory operand
+vpcmpgtb ymm4, ymm0, [rdx + 32 * 1]
+vpcmpgtb xmm5, xmm0, [rdx + 32 * 1]
+
+hlt
+
+align 32
+.data:
+dq 0x7172737475767778
+dq 0x4142434445464748
+dq 0x7172737475767778
+dq 0x4142434445464748
+
+dq 0x6162636465666768
+dq 0x5152535455565758
+dq 0x6162636465666768
+dq 0x5152535455565758
\ No newline at end of file