diff --git a/src/panfrost/compiler/bifrost_compile.c b/src/panfrost/compiler/bifrost_compile.c
index dbbae9339e1..9f2f404d61c 100644
--- a/src/panfrost/compiler/bifrost_compile.c
+++ b/src/panfrost/compiler/bifrost_compile.c
@@ -860,6 +860,33 @@ bi_emit_atest(bi_builder *b, bi_index alpha)
    b->shader->emitted_atest = true;
 }
 
+static bi_index
+bi_src_color_vec4(bi_builder *b, nir_src *src, nir_alu_type T)
+{
+   unsigned num_components = nir_src_num_components(*src);
+   bi_index base = bi_src_index(src);
+
+   /* short-circuit the common case */
+   if (num_components == 4)
+      return base;
+
+   unsigned size = nir_alu_type_get_type_size(T);
+   assert(size == 16 || size == 32);
+
+   bi_index src_vals[4];
+
+   unsigned i;
+   for (i = 0; i < num_components; i++)
+      src_vals[i] = bi_extract(b, base, i);
+
+   for(; i < 3; i++)
+      src_vals[i] = (size == 16) ? bi_imm_f16(0.0) : bi_imm_f32(0.0);
+   src_vals[3] = (size == 16) ? bi_imm_f16(1.0) : bi_imm_f32(1.0);
+   bi_index temp = bi_temp(b->shader);
+   bi_make_vec_to(b, temp, src_vals, NULL, 4, size);
+   return temp;
+}
+
 static void
 bi_emit_fragment_out(bi_builder *b, nir_intrinsic_instr *instr)
 {
@@ -922,9 +949,10 @@ bi_emit_fragment_out(bi_builder *b, nir_intrinsic_instr *instr)
    if (emit_blend) {
       unsigned rt = loc ? (loc - FRAG_RESULT_DATA0) : 0;
       bool dual = (writeout & PAN_WRITEOUT_2);
-      bi_index color = bi_src_index(&instr->src[0]);
-      bi_index color2 = dual ? bi_src_index(&instr->src[4]) : bi_null();
+      nir_alu_type T = nir_intrinsic_src_type(instr);
       nir_alu_type T2 = dual ? nir_intrinsic_dest_type(instr) : 0;
+      bi_index color = bi_src_color_vec4(b, &instr->src[0], T);
+      bi_index color2 = dual ? bi_src_color_vec4(b, &instr->src[4], T2) : bi_null();
 
       /* Explicit copy since BLEND inputs are precoloured to R0-R3,
        * TODO: maybe schedule around this or implement in RA as a