diff --git a/src/nouveau/compiler/nak_nir.c b/src/nouveau/compiler/nak_nir.c
index cbc236b45ef..977c999670b 100644
--- a/src/nouveau/compiler/nak_nir.c
+++ b/src/nouveau/compiler/nak_nir.c
@@ -172,6 +172,7 @@ optimize_nir(nir_shader *nir, const struct nak_compiler *nak, bool allow_copies)
       OPT(nir, nir_opt_gcm, false);
       OPT(nir, nir_opt_undef);
    } while (progress);
+   OPT(nir, nir_lower_undef_to_zero);
 
    OPT(nir, nir_remove_dead_variables, nir_var_function_temp, NULL);
 }