diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c
index 345f5fa73..30ce7cec3 100644
--- a/libs/vkd3d-shader/hlsl_codegen.c
+++ b/libs/vkd3d-shader/hlsl_codegen.c
@@ -6439,8 +6439,9 @@ static void register_deref_usage(struct hlsl_ctx *ctx, const struct hlsl_deref *
     else if (regset == HLSL_REGSET_NUMERIC)
     {
         type = hlsl_deref_get_type(ctx, deref);
+        VKD3D_ASSERT(type->class <= HLSL_CLASS_VECTOR);
 
-        required_bind_count = align(index + type->reg_size[regset], 4) / 4;
+        required_bind_count = align(index + type->e.numeric.dimx, 4) / 4;
         var->bind_count[regset] = max(var->bind_count[regset], required_bind_count);
     }
     else