diff --git a/src/mesa/state_tracker/st_nir_lower_tex_src_plane.c b/src/mesa/state_tracker/st_nir_lower_tex_src_plane.c
index 090e5bf87bd..44597e789a2 100644
--- a/src/mesa/state_tracker/st_nir_lower_tex_src_plane.c
+++ b/src/mesa/state_tracker/st_nir_lower_tex_src_plane.c
@@ -66,7 +66,7 @@ add_sampler(lower_tex_src_state *state, unsigned orig_binding,
          find_sampler(state, orig_binding);
    char *name;
 
-   asprintf(&name, "%s:%s", orig_sampler->name, ext);
+   UNUSED int r = asprintf(&name, "%s:%s", orig_sampler->name, ext);
    new_sampler = nir_variable_create(state->shader, nir_var_uniform,
                              samplerExternalOES, name);
    free(name);