diff --git a/src/gallium/drivers/iris/iris_program.c b/src/gallium/drivers/iris/iris_program.c
index 44f2d6ed419..f43d9b1fa54 100644
--- a/src/gallium/drivers/iris/iris_program.c
+++ b/src/gallium/drivers/iris/iris_program.c
@@ -1303,12 +1303,14 @@ iris_compile_vs(struct iris_screen *screen,
 
    if (key->vue.nr_userclip_plane_consts) {
       nir_function_impl *impl = nir_shader_get_entrypoint(nir);
-      nir_lower_clip_vs(nir, (1 << key->vue.nr_userclip_plane_consts) - 1,
-                        true, false, NULL);
-      nir_lower_io_to_temporaries(nir, impl, true, false);
-      nir_lower_global_vars_to_local(nir);
-      nir_lower_vars_to_ssa(nir);
-      nir_shader_gather_info(nir, impl);
+      /* Check if variables were found. */
+      if (nir_lower_clip_vs(nir, (1 << key->vue.nr_userclip_plane_consts) - 1,
+                            true, false, NULL)) {
+         nir_lower_io_to_temporaries(nir, impl, true, false);
+         nir_lower_global_vars_to_local(nir);
+         nir_lower_vars_to_ssa(nir);
+         nir_shader_gather_info(nir, impl);
+      }
    }
 
    prog_data->use_alt_mode = nir->info.use_legacy_math_rules;