diff --git a/plugins/woocommerce/changelog/fix-34745-update-industries-error b/plugins/woocommerce/changelog/fix-34745-update-industries-error
new file mode 100644
index 00000000000..08e934a58e9
--- /dev/null
+++ b/plugins/woocommerce/changelog/fix-34745-update-industries-error
@@ -0,0 +1,4 @@
+Significance: patch
+Type: fix
+
+Fix failing to update onboarding profile data for PHP 8
diff --git a/plugins/woocommerce/src/Admin/API/OnboardingProfile.php b/plugins/woocommerce/src/Admin/API/OnboardingProfile.php
index 0c172fe68fb..44831382f1d 100644
--- a/plugins/woocommerce/src/Admin/API/OnboardingProfile.php
+++ b/plugins/woocommerce/src/Admin/API/OnboardingProfile.php
@@ -443,7 +443,7 @@ class OnboardingProfile extends \WC_REST_Data_Controller {
 				'description'       => __( 'Whether or not this store country is set via onboarding profiler.', 'woocommerce' ),
 				'context'           => array( 'view' ),
 				'readonly'          => true,
-				'validate_callback' => array( __CLASS__, 'rest_validate_request_arg' ),
+				'validate_callback' => 'rest_validate_request_arg',
 			),
 		);
 
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/api/onboarding-profile.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/api/onboarding-profile.php
index 70d5986bcae..791b1554b34 100644
--- a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/api/onboarding-profile.php
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/api/onboarding-profile.php
@@ -67,7 +67,31 @@ class WC_Admin_Tests_API_Onboarding_Profiles extends WC_REST_Unit_Test_Case {
 				'slug' => 'health-beauty',
 			),
 		);
-		$request->set_body( wp_json_encode( array( 'industry' => $industry ) ) );
+		$request->set_body(
+			wp_json_encode(
+				array(
+					'completed'            => true,
+					'skipped'              => false,
+					'industry'             => $industry,
+					'product_types'        => 'physical',
+					'product_count'        => '1-10',
+					'selling_venues'       => 'brick-mortar',
+					'number_employees'     => '<10',
+					'revenue'              => 'none',
+					'other_platform'       => 'shopify',
+					'other_platform_name'  => '',
+					'business_extensions'  => array(
+						'jetpack',
+					),
+					'theme'                => 'Test',
+					'wccom_connected'      => false,
+					'setup_client'         => false,
+					'is_agree_marketing'   => true,
+					'store_email'          => 'user@example.com',
+					'is_store_country_set' => true,
+				)
+			)
+		);
 		$response = $this->server->dispatch( $request );
 		$data     = $response->get_data();