diff --git a/src/wp-includes/sitemaps/providers/class-wp-sitemaps-posts.php b/src/wp-includes/sitemaps/providers/class-wp-sitemaps-posts.php
index e03af6e357..56acfb7697 100644
--- a/src/wp-includes/sitemaps/providers/class-wp-sitemaps-posts.php
+++ b/src/wp-includes/sitemaps/providers/class-wp-sitemaps-posts.php
@@ -174,7 +174,8 @@ class WP_Sitemaps_Posts extends WP_Sitemaps_Provider {
 
 		$query = new WP_Query( $args );
 
-		return isset( $query->max_num_pages ) ? $query->max_num_pages : 1;
+		$min_num_pages = ( 'page' === $post_type && 'posts' === get_option( 'show_on_front' ) ) ? 1 : 0;
+		return isset( $query->max_num_pages ) ? max( $min_num_pages, $query->max_num_pages ) : 1;
 	}
 
 	/**
diff --git a/tests/phpunit/tests/sitemaps/sitemaps-posts.php b/tests/phpunit/tests/sitemaps/sitemaps-posts.php
index 8d173942f4..d102518587 100644
--- a/tests/phpunit/tests/sitemaps/sitemaps-posts.php
+++ b/tests/phpunit/tests/sitemaps/sitemaps-posts.php
@@ -4,6 +4,29 @@
  * @group sitemaps
  */
 class Test_WP_Sitemaps_Posts extends WP_UnitTestCase {
+	/**
+	 * Tests getting sitemap entries for post type page with 'posts' homepage.
+	 *
+	 * Ensures that an entry is added even if there are no pages.
+	 *
+	 * @ticket 50571
+	 */
+	public function test_get_sitemap_entries_homepage() {
+		update_option( 'show_on_front', 'posts' );
+
+		$posts_provider = new WP_Sitemaps_Posts();
+
+		$post_list = $posts_provider->get_sitemap_entries();
+
+		$expected = array(
+			array(
+				'loc' => home_url( '/?sitemap=posts&sitemap-subtype=page&paged=1' ),
+			),
+		);
+
+		$this->assertEquals( $expected, $post_list );
+	}
+
 	/**
 	 * Test ability to filter object subtypes.
 	 */