diff --git a/src/gallium/drivers/radeonsi/si_nir_lower_abi.c b/src/gallium/drivers/radeonsi/si_nir_lower_abi.c
index c96572bd5a9..8a99e9682b9 100644
--- a/src/gallium/drivers/radeonsi/si_nir_lower_abi.c
+++ b/src/gallium/drivers/radeonsi/si_nir_lower_abi.c
@@ -637,7 +637,9 @@ static bool lower_intrinsic(nir_builder *b, nir_instr *instr, struct lower_abi_s
       /* Load point coordinates (x, y) which are written by the hw after the interpolated inputs */
       replacement = nir_load_interpolated_input(b, 2, 32, interp_param, nir_imm_int(b, 0),
                                                 .base = si_get_ps_num_interp(shader),
-                                                .component = 2);
+                                                .component = 2,
+                                                /* This tells si_nir_scan_shader that it's PARAM_GEN */
+                                                .io_semantics.no_varying = 1);
       break;
    }
    case nir_intrinsic_load_poly_line_smooth_enabled:
diff --git a/src/gallium/drivers/radeonsi/si_shader_info.c b/src/gallium/drivers/radeonsi/si_shader_info.c
index f14ff069cbc..5f6007898db 100644
--- a/src/gallium/drivers/radeonsi/si_shader_info.c
+++ b/src/gallium/drivers/radeonsi/si_shader_info.c
@@ -260,6 +260,10 @@ static void scan_io_usage(const nir_shader *nir, struct si_shader_info *info,
       semantic = nir_intrinsic_io_semantics(intr).location;
 
    if (nir->info.stage == MESA_SHADER_FRAGMENT && is_input) {
+      /* The PARAM_GEN input shouldn't be scanned. */
+      if (nir_intrinsic_io_semantics(intr).no_varying)
+         return;
+
       /* Gather color PS inputs. We can only get here after lowering colors in monolithic
        * shaders. This must match what we do for nir_intrinsic_load_color0/1.
        */