diff --git a/src/nouveau/compiler/nak_nir.c b/src/nouveau/compiler/nak_nir.c
index 61efbc7f09a..6a89401e808 100644
--- a/src/nouveau/compiler/nak_nir.c
+++ b/src/nouveau/compiler/nak_nir.c
@@ -88,6 +88,12 @@ vectorize_filter_cb(const nir_instr *instr, const void *_data)
    }
 }
 
+static uint8_t
+phi_vectorize_cb(const nir_instr *instr, const void *data)
+{
+   return 1;
+}
+
 static void
 optimize_nir(nir_shader *nir, const struct nak_compiler *nak, bool allow_copies)
 {
@@ -130,7 +136,7 @@ optimize_nir(nir_shader *nir, const struct nak_compiler *nak, bool allow_copies)
 
       OPT(nir, nir_lower_alu_width, vectorize_filter_cb, NULL);
       OPT(nir, nir_opt_vectorize, vectorize_filter_cb, NULL);
-      OPT(nir, nir_lower_phis_to_scalar, NULL, NULL);
+      OPT(nir, nir_lower_phis_to_scalar, phi_vectorize_cb, NULL);
       OPT(nir, nir_lower_frexp);
       OPT(nir, nir_copy_prop);
       OPT(nir, nir_opt_dce);