diff --git a/src/panfrost/bifrost/bifrost_compile.c b/src/panfrost/bifrost/bifrost_compile.c
index cedf32b818e..db4ec229d4c 100644
--- a/src/panfrost/bifrost/bifrost_compile.c
+++ b/src/panfrost/bifrost/bifrost_compile.c
@@ -770,6 +770,10 @@ bi_emit_blend_op(bi_builder *b, bi_index rgba, nir_alu_type T,
         uint64_t blend_desc = inputs->blend.bifrost_blend_desc;
         enum bi_register_format regfmt = bi_reg_fmt_for_nir(T);
 
+        /* Workaround for NIR-to-TGSI */
+        if (b->shader->nir->info.fs.untyped_color_outputs)
+                regfmt = BI_REGISTER_FORMAT_AUTO;
+
         if (inputs->is_blend && inputs->blend.nr_samples > 1) {
                 /* Conversion descriptor comes from the compile inputs, pixel
                  * indices derived at run time based on sample ID */