diff --git a/renderdoc/driver/shaders/dxil/dxil_debug.cpp b/renderdoc/driver/shaders/dxil/dxil_debug.cpp
index 9f64a9175..e7bf3fc3b 100644
--- a/renderdoc/driver/shaders/dxil/dxil_debug.cpp
+++ b/renderdoc/driver/shaders/dxil/dxil_debug.cpp
@@ -3441,8 +3441,20 @@ bool ThreadState::ExecuteInstruction(DebugAPIWrapper *apiWrapper,
                 (uint32_t)(((c.value.u32v[0] << offset) & bitmask) | (d.value.u32v[0] & ~bitmask));
             break;
           }
-          // Likely to implement when required
           case DXOp::MakeDouble:
+          {
+            // MakeDouble(lo,hi)
+            RDCASSERTEQUAL(inst.args[1]->type->type, Type::TypeKind::Scalar);
+            RDCASSERTEQUAL(inst.args[2]->type->type, Type::TypeKind::Scalar);
+            ShaderVariable a;
+            ShaderVariable b;
+            RDCASSERT(GetShaderVariable(inst.args[1], opCode, dxOpCode, a));
+            RDCASSERT(GetShaderVariable(inst.args[2], opCode, dxOpCode, b));
+            RDCASSERTEQUAL(a.type, b.type);
+            result.value.u64v[0] = ((uint64_t)b.value.u32v[0] << 32) | a.value.u32v[0];
+            break;
+          }
+          // Likely to implement when required
           case DXOp::SplitDouble:
           case DXOp::BitcastI16toF16:
           case DXOp::BitcastF16toI16:
diff --git a/renderdoc/driver/shaders/dxil/dxil_reflect.cpp b/renderdoc/driver/shaders/dxil/dxil_reflect.cpp
index 9693bcdde..868939780 100644
--- a/renderdoc/driver/shaders/dxil/dxil_reflect.cpp
+++ b/renderdoc/driver/shaders/dxil/dxil_reflect.cpp
@@ -1826,7 +1826,6 @@ rdcstr Program::GetDebugStatus()
               case DXOp::CutStream:
               case DXOp::EmitThenCutStream:
               case DXOp::GSInstanceID:
-              case DXOp::MakeDouble:
               case DXOp::SplitDouble:
               case DXOp::LoadOutputControlPoint:
               case DXOp::LoadPatchConstant: