diff --git a/src/gallium/auxiliary/draw/draw_pipe_pstipple.c b/src/gallium/auxiliary/draw/draw_pipe_pstipple.c
index 1aff54afa95..e708c8adebb 100644
--- a/src/gallium/auxiliary/draw/draw_pipe_pstipple.c
+++ b/src/gallium/auxiliary/draw/draw_pipe_pstipple.c
@@ -147,7 +147,8 @@ generate_pstip_fs(struct pstip_stage *pstip)
    } else {
       pstip_fs.ir.nir = nir_shader_clone(NULL, orig_fs->ir.nir);
       nir_lower_pstipple_fs(pstip_fs.ir.nir,
-                            &pstip->fs->sampler_unit, 0, wincoord_file == TGSI_FILE_SYSTEM_VALUE);
+                            &pstip->fs->sampler_unit, 0, wincoord_file == TGSI_FILE_SYSTEM_VALUE,
+                            nir_type_bool32);
    }
 
    assert(pstip->fs->sampler_unit < PIPE_MAX_SAMPLERS);
diff --git a/src/gallium/auxiliary/nir/nir_draw_helpers.c b/src/gallium/auxiliary/nir/nir_draw_helpers.c
index 96cd395d44d..60fcf7dd941 100644
--- a/src/gallium/auxiliary/nir/nir_draw_helpers.c
+++ b/src/gallium/auxiliary/nir/nir_draw_helpers.c
@@ -44,6 +44,7 @@ typedef struct {
    bool fs_pos_is_sysval;
    nir_variable *stip_tex;
    nir_ssa_def *fragcoord;
+   nir_alu_type bool_type;
 } lower_pstipple;
 
 static nir_ssa_def *
@@ -90,6 +91,18 @@ nir_lower_pstipple_block(nir_block *block,
    nir_builder_instr_insert(b, &tex->instr);
 
    nir_ssa_def *condition = nir_f2b32(b, nir_channel(b, &tex->dest.ssa, 3));
+
+   switch (state->bool_type) {
+   case nir_type_bool1:
+      condition = nir_f2b(b, nir_channel(b, &tex->dest.ssa, 3));
+      break;
+   case nir_type_bool32:
+      condition = nir_f2b32(b, nir_channel(b, &tex->dest.ssa, 3));
+      break;
+   default:
+      unreachable("Invalid Boolean type.");
+   }
+
    nir_discard_if(b, condition);
    b->shader->info.fs.uses_discard = true;
 }
@@ -110,12 +123,18 @@ void
 nir_lower_pstipple_fs(struct nir_shader *shader,
                       unsigned *samplerUnitOut,
                       unsigned fixedUnit,
-                      bool fs_pos_is_sysval)
+                      bool fs_pos_is_sysval,
+                      nir_alu_type bool_type)
 {
    lower_pstipple state = {
       .shader = shader,
       .fs_pos_is_sysval = fs_pos_is_sysval,
+      .bool_type = bool_type,
    };
+
+   assert(bool_type == nir_type_bool1 ||
+          bool_type == nir_type_bool32);
+
    if (shader->info.stage != MESA_SHADER_FRAGMENT)
       return;
 
diff --git a/src/gallium/auxiliary/nir/nir_draw_helpers.h b/src/gallium/auxiliary/nir/nir_draw_helpers.h
index ef6ffd79b20..966789c8803 100644
--- a/src/gallium/auxiliary/nir/nir_draw_helpers.h
+++ b/src/gallium/auxiliary/nir/nir_draw_helpers.h
@@ -35,7 +35,8 @@ void
 nir_lower_pstipple_fs(struct nir_shader *shader,
                       unsigned *samplerUnitOut,
                       unsigned fixedUnit,
-                      bool fs_pos_is_sysval);
+                      bool fs_pos_is_sysval,
+                      nir_alu_type bool_type);
 
 void
 nir_lower_aaline_fs(struct nir_shader *shader, int *varying,
diff --git a/src/gallium/drivers/d3d12/d3d12_compiler.cpp b/src/gallium/drivers/d3d12/d3d12_compiler.cpp
index 75681797225..78228e45f5d 100644
--- a/src/gallium/drivers/d3d12/d3d12_compiler.cpp
+++ b/src/gallium/drivers/d3d12/d3d12_compiler.cpp
@@ -1112,7 +1112,7 @@ select_shader_variant(struct d3d12_selection_context *sel_ctx, d3d12_shader_sele
    {
       if (key.fs.polygon_stipple) {
          NIR_PASS_V(new_nir_variant, nir_lower_pstipple_fs,
-                    &pstipple_binding, 0, false);
+                    &pstipple_binding, 0, false, nir_type_bool1);
 
          nir_function_impl *impl = nir_shader_get_entrypoint(new_nir_variant);
          nir_shader_gather_info(new_nir_variant, impl);