diff --git a/src/amd/common/ac_nir_lower_ngg.c b/src/amd/common/ac_nir_lower_ngg.c
index 9e44b4a435a..b1983632b41 100644
--- a/src/amd/common/ac_nir_lower_ngg.c
+++ b/src/amd/common/ac_nir_lower_ngg.c
@@ -856,8 +856,7 @@ cleanup_culling_shader_after_dce(nir_shader *shader,
             uses_vs_instance_id = true;
             break;
          case nir_intrinsic_load_input:
-            if (state->options->instance_rate_inputs &
-                (1u << (nir_intrinsic_base(intrin) - VERT_ATTRIB_GENERIC0)))
+            if (state->options->instance_rate_inputs & BITFIELD_BIT(nir_intrinsic_base(intrin)))
                uses_vs_instance_id = true;
             else
                uses_vs_vertex_id = true;
diff --git a/src/amd/vulkan/radv_shader.c b/src/amd/vulkan/radv_shader.c
index 90c8fa3bdb1..0eb9a775911 100644
--- a/src/amd/vulkan/radv_shader.c
+++ b/src/amd/vulkan/radv_shader.c
@@ -1461,7 +1461,7 @@ void radv_lower_ngg(struct radv_device *device, struct radv_pipeline_stage *ngg_
       options.early_prim_export = info->has_ngg_early_prim_export;
       options.passthrough = info->is_ngg_passthrough;
       options.primitive_id_location = info->outinfo.export_prim_id ? VARYING_SLOT_PRIMITIVE_ID : -1;
-      options.instance_rate_inputs = pl_key->vs.instance_rate_inputs;
+      options.instance_rate_inputs = pl_key->vs.instance_rate_inputs << VERT_ATTRIB_GENERIC0;
 
       NIR_PASS_V(nir, ac_nir_lower_ngg_nogs, &options);