diff --git a/src/mesa/state_tracker/st_nir_lower_position_invariant.c b/src/mesa/state_tracker/st_nir_lower_position_invariant.c
index 0904e3838f1..c57368db1b8 100644
--- a/src/mesa/state_tracker/st_nir_lower_position_invariant.c
+++ b/src/mesa/state_tracker/st_nir_lower_position_invariant.c
@@ -33,9 +33,18 @@ st_nir_lower_position_invariant(struct nir_shader *s, bool aos,
    }
 
    nir_def *result;
-   nir_def *in_pos = nir_load_var(&b, nir_get_variable_with_location(s, nir_var_shader_in,
-                                                                         VERT_ATTRIB_POS, glsl_vec4_type()));
-   s->info.inputs_read |= VERT_BIT_POS;
+   nir_def *in_pos;
+
+   if (s->info.io_lowered) {
+      in_pos = nir_load_input(&b, 4, 32, nir_imm_int(&b, 0),
+                              .io_semantics.location = VERT_ATTRIB_POS);
+   } else {
+      in_pos = nir_load_var(&b, nir_get_variable_with_location(s, nir_var_shader_in,
+                                                               VERT_ATTRIB_POS,
+                                                               glsl_vec4_type()));
+      s->info.inputs_read |= VERT_BIT_POS;
+   }
+
    if (aos) {
       nir_def *chans[4];
       for (int i = 0; i < 4; i++)
@@ -46,9 +55,16 @@ st_nir_lower_position_invariant(struct nir_shader *s, bool aos,
       for (int i = 1; i < 4; i++)
          result = nir_fmad(&b, mvp[i], nir_channel(&b, in_pos, i), result);
    }
-   nir_store_var(&b, nir_get_variable_with_location(s, nir_var_shader_out,
-                                                    VARYING_SLOT_POS, glsl_vec4_type()), result, 0xf);
-   s->info.outputs_written |= VARYING_BIT_POS;
+
+   if (s->info.io_lowered) {
+      nir_store_output(&b, result, nir_imm_int(&b, 0),
+                       .io_semantics.location = VARYING_SLOT_POS);
+   } else {
+      nir_store_var(&b, nir_get_variable_with_location(s, nir_var_shader_out,
+                                                       VARYING_SLOT_POS,
+                                                       glsl_vec4_type()), result, 0xf);
+      s->info.outputs_written |= VARYING_BIT_POS;
+   }
 
    nir_metadata_preserve(b.impl, nir_metadata_control_flow);