diff --git a/src/Ryujinx.Graphics.Shader/CodeGen/Msl/Declarations.cs b/src/Ryujinx.Graphics.Shader/CodeGen/Msl/Declarations.cs
index f08b994b54..d2be0c2234 100644
--- a/src/Ryujinx.Graphics.Shader/CodeGen/Msl/Declarations.cs
+++ b/src/Ryujinx.Graphics.Shader/CodeGen/Msl/Declarations.cs
@@ -143,8 +143,8 @@ namespace Ryujinx.Graphics.Shader.CodeGen.Msl
 
                     foreach (var ioDefinition in inputs.OrderBy(x => x.Location))
                     {
-                        string type = GetVarTypeName(context, context.Definitions.GetUserDefinedType(ioDefinition.Location, isOutput: false));
-                        string name = $"{DefaultNames.IAttributePrefix}{ioDefinition.Location}";
+                        string type = GetVarTypeName(context, context.Definitions.GetUserDefinedType(ioDefinition.Location, isOutput: true));
+                        string name = $"{DefaultNames.OAttributePrefix}{ioDefinition.Location}";
                         string suffix = ioDefinition.IoVariable == IoVariable.Position ? " [[position]]" : "";
 
                         context.AppendLine($"{type} {name}{suffix};");
diff --git a/src/Ryujinx.Graphics.Shader/CodeGen/Msl/Instructions/IoMap.cs b/src/Ryujinx.Graphics.Shader/CodeGen/Msl/Instructions/IoMap.cs
index 7b11e54f19..c30e317b36 100644
--- a/src/Ryujinx.Graphics.Shader/CodeGen/Msl/Instructions/IoMap.cs
+++ b/src/Ryujinx.Graphics.Shader/CodeGen/Msl/Instructions/IoMap.cs
@@ -25,7 +25,7 @@ namespace Ryujinx.Graphics.Shader.CodeGen.Msl.Instructions
                 IoVariable.InstanceId => ("instance_id", AggregateType.S32),
                 IoVariable.PointCoord => ("point_coord", AggregateType.Vector2),
                 IoVariable.PointSize => ("point_size", AggregateType.FP32),
-                IoVariable.Position => ("position", AggregateType.Vector4 | AggregateType.FP32),
+                IoVariable.Position => ("out.position", AggregateType.Vector4 | AggregateType.FP32),
                 IoVariable.PrimitiveId => ("primitive_id", AggregateType.S32),
                 IoVariable.UserDefined => GetUserDefinedVariableName(definitions, location, component, isOutput, isPerPatch),
                 IoVariable.VertexId => ("vertex_id", AggregateType.S32),