diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c
index 8cb4b0f0..2a6dbbca 100644
--- a/libs/vkd3d-shader/hlsl_codegen.c
+++ b/libs/vkd3d-shader/hlsl_codegen.c
@@ -6519,6 +6519,11 @@ static void generate_vsir_signature_entry(struct hlsl_ctx *ctx, struct vsir_prog
                 sysval = VKD3D_SHADER_SV_POSITION;
         }
 
+        if (!ascii_strcasecmp(var->semantic.name, "PSIZE") && output
+                && program->shader_version.type == VKD3D_SHADER_TYPE_VERTEX && var->data_type->dimx > 1)
+            hlsl_error(ctx, &var->loc, VKD3D_SHADER_ERROR_HLSL_INVALID_SEMANTIC,
+                    "PSIZE output must have only 1 component in this shader model.");
+
         mask = (1 << var->data_type->dimx) - 1;
         use_mask = mask; /* FIXME: retrieve use mask accurately. */
         component_type = VKD3D_SHADER_COMPONENT_FLOAT;
diff --git a/tests/hlsl/shader-point-size.shader_test b/tests/hlsl/shader-point-size.shader_test
index a77259bb..00bf157d 100644
--- a/tests/hlsl/shader-point-size.shader_test
+++ b/tests/hlsl/shader-point-size.shader_test
@@ -9,7 +9,7 @@ shader model < 4.0
 -0.5 0      20
  0.5 0      40
 
-[vertex shader fail todo]
+[vertex shader fail]
 void main(inout float4 pos : position, out float2 size : psize)
 {
     size = 1;