diff --git a/src/gallium/drivers/radeonsi/si_shader_args.c b/src/gallium/drivers/radeonsi/si_shader_args.c
index eb102699495..b5754cb48da 100644
--- a/src/gallium/drivers/radeonsi/si_shader_args.c
+++ b/src/gallium/drivers/radeonsi/si_shader_args.c
@@ -671,7 +671,7 @@ void si_get_ps_prolog_args(struct si_shader_args *args,
    ac_add_arg(&args->ac, AC_ARG_VGPR, 2, AC_ARG_VALUE, &args->ac.linear_sample);
    ac_add_arg(&args->ac, AC_ARG_VGPR, 2, AC_ARG_VALUE, &args->ac.linear_center);
    ac_add_arg(&args->ac, AC_ARG_VGPR, 2, AC_ARG_VALUE, &args->ac.linear_centroid);
-   /* skip LINE_STIPPLE_TEX */
+   ac_add_arg(&args->ac, AC_ARG_VGPR, 1, AC_ARG_VALUE, NULL); /* LINE_STIPPLE_TEX */
 
    /* POS_X|Y|Z|W_FLOAT */
    u_foreach_bit(i, key->ps_prolog.fragcoord_usage_mask)
diff --git a/src/gallium/drivers/radeonsi/si_shader_internal.h b/src/gallium/drivers/radeonsi/si_shader_internal.h
index c09b0ec884e..410ac243ac3 100644
--- a/src/gallium/drivers/radeonsi/si_shader_internal.h
+++ b/src/gallium/drivers/radeonsi/si_shader_internal.h
@@ -16,6 +16,7 @@
    S_0286D0_LINEAR_SAMPLE_ENA(1) |              \
    S_0286D0_LINEAR_CENTER_ENA(1) |              \
    S_0286D0_LINEAR_CENTROID_ENA(1) |            \
+   S_0286D0_LINE_STIPPLE_TEX_ENA(1) |           \
    S_0286D0_FRONT_FACE_ENA(1) |                 \
    S_0286D0_ANCILLARY_ENA(1) |                  \
    S_0286D0_SAMPLE_COVERAGE_ENA(1) |            \
diff --git a/src/gallium/drivers/radeonsi/si_shader_variant_info.c b/src/gallium/drivers/radeonsi/si_shader_variant_info.c
index f848814e5e3..9dcc05a62b6 100644
--- a/src/gallium/drivers/radeonsi/si_shader_variant_info.c
+++ b/src/gallium/drivers/radeonsi/si_shader_variant_info.c
@@ -423,7 +423,15 @@ void si_fixup_spi_ps_input_config(struct si_shader *shader)
       shader->config.spi_ps_input_ena |= S_0286CC_PERSP_SAMPLE_ENA(1);
    }
 
-   /* At least one pair of interpolation weights must be enabled. */
-   if (!(shader->config.spi_ps_input_ena & 0x7f))
-      shader->config.spi_ps_input_ena |= S_0286CC_PERSP_SAMPLE_ENA(1);
+   /* At least one pair of barycentric coordinates or LINE_STIPPLE_TEX_ENA must be enabled.
+    * Since LINE_STIPPLE_TEX_ENA is the only one that loads only 1 VGPR, use it.
+    */
+   if (!(shader->config.spi_ps_input_ena & 0x7f) &&
+       !G_0286CC_LINE_STIPPLE_TEX_ENA(shader->config.spi_ps_input_ena)) {
+      /* LLVM sets PERSP_SAMPLE_ENA in this case, so we have to do the same. */
+      if (shader->selector->info.base.use_aco_amd)
+         shader->config.spi_ps_input_ena |= S_0286CC_LINE_STIPPLE_TEX_ENA(1);
+      else
+         shader->config.spi_ps_input_ena |= S_0286CC_PERSP_SAMPLE_ENA(1);
+   }
 }