diff --git a/functionMap.php b/functionMap.php
index 72a77c4..49bbef4 100644
--- a/functionMap.php
+++ b/functionMap.php
@@ -73,6 +73,7 @@
     'apply_filters_ref_array' => [null, 'hook_name' => 'non-empty-string'],
     'apply_filters_deprecated' => [null, 'hook_name' => 'non-empty-string'],
     'backslashit' => [null, '@phpstan-pure' => ''],
+    'block_core_breadcrumbs_create_item' => ['($is_paged is true ? array{label: T, url: string} : array{label: T})', '@phpstan-template T' => 'of string', 'text' => 'T'],
     'block_core_home_link_build_css_colors' => ['array{css_classes: list<string>, inline_styles: string}'],
     'block_core_home_link_build_css_font_sizes' => ['array{css_classes: list<string>, inline_styles: string}'],
     'block_core_navigation_build_css_colors' => ['array{css_classes: list<string>, inline_styles: string, overlay_css_classes: list<string>, overlay_inline_styles: string}'],
diff --git a/tests/data/return/block-core.php b/tests/data/return/block-core.php
index 0be2ab4..0b6b9fd 100644
--- a/tests/data/return/block-core.php
+++ b/tests/data/return/block-core.php
@@ -34,3 +34,9 @@
 assertType('array{css_classes: list<string>, inline_styles: string}', block_core_navigation_submenu_build_css_font_sizes(Faker::array()));
 assertType('array{css_classes: list<string>, inline_styles: string, overlay_css_classes: list<string>, overlay_inline_styles: string}', block_core_page_list_build_css_colors(Faker::array(), Faker::array()));
 assertType('array{css_classes: list<string>, inline_styles: string}', block_core_page_list_build_css_font_sizes(Faker::array()));
+
+// Breadcrumbs
+assertType('array{label: string, url?: string}', block_core_breadcrumbs_create_item(Faker::string(), Faker::bool()));
+assertType("array{label: 'foo', url?: string}", block_core_breadcrumbs_create_item('foo', Faker::bool()));
+assertType('array{label: string}', block_core_breadcrumbs_create_item(Faker::string(), false));
+assertType('array{label: string, url: string}', block_core_breadcrumbs_create_item(Faker::string(), true));
diff --git a/wordpress-stubs.php b/wordpress-stubs.php
index 000a323..1626fd9 100644
--- a/wordpress-stubs.php
+++ b/wordpress-stubs.php
@@ -113436,6 +113436,9 @@ function block_core_breadcrumbs_create_page_number_item($query_var = 'paged')
      * @param bool   $is_paged   Whether we're on a paginated view.
      *
      * @return array The breadcrumb item data.
+     * @phpstan-template T of string
+     * @phpstan-param T $text
+     * @phpstan-return ($is_paged is true ? array{label: T, url: string} : array{label: T})
      */
     function block_core_breadcrumbs_create_item($text, $is_paged = \false)
     {