diff --git a/.pick_status.json b/.pick_status.json
index fc3bc01055a..abc17498c0b 100644
--- a/.pick_status.json
+++ b/.pick_status.json
@@ -1525,7 +1525,7 @@
         "description": "zink: handle 1bit undef values in ntv",
         "nominated": true,
         "nomination_type": 1,
-        "resolution": 0,
+        "resolution": 1,
         "master_sha": null,
         "because_sha": "93af00502ebc32061c63927815d0d2255fe66a98"
     },
diff --git a/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c b/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
index b24e68da8cc..9bf3011f6b0 100644
--- a/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
+++ b/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
@@ -2080,8 +2080,9 @@ emit_intrinsic(struct ntv_context *ctx, nir_intrinsic_instr *intr)
 static void
 emit_undef(struct ntv_context *ctx, nir_ssa_undef_instr *undef)
 {
-   SpvId type = get_uvec_type(ctx, undef->def.bit_size,
-                              undef->def.num_components);
+   SpvId type = undef->def.bit_size == 1 ? get_bvec_type(ctx, undef->def.num_components) :
+                                           get_uvec_type(ctx, undef->def.bit_size,
+                                                         undef->def.num_components);
 
    store_ssa_def(ctx, &undef->def,
                  spirv_builder_emit_undef(&ctx->builder, type));