diff --git a/libs/vkd3d-shader/d3d_asm.c b/libs/vkd3d-shader/d3d_asm.c
index 4582b22a..7df2f163 100644
--- a/libs/vkd3d-shader/d3d_asm.c
+++ b/libs/vkd3d-shader/d3d_asm.c
@@ -1330,7 +1330,7 @@ static void shader_dump_src_param(struct vkd3d_d3d_asm_compiler *compiler,
     }
 
     if (param->reg.type != VKD3DSPR_IMMCONST && param->reg.type != VKD3DSPR_IMMCONST64
-            && param->reg.type != VKD3DSPR_SAMPLER)
+            && param->reg.dimension == VSIR_DIMENSION_VEC4)
     {
         unsigned int swizzle_x = vkd3d_swizzle_get_component(swizzle, 0);
         unsigned int swizzle_y = vkd3d_swizzle_get_component(swizzle, 1);