diff --git a/antispam.module b/antispam.module
index 21ea2c3..13652a5 100644
--- a/antispam.module
+++ b/antispam.module
@@ -730,6 +730,20 @@ function antispam_callback_set_spam_status($content_type, $object, $op) {
   }
 }
 
+/**
+ * Webform: Check submitted values for spam.
+ */
+function antispam_webform_check($form, &$form_state) {
+	foreach ($form_state['values']['submitted'] as $value) {
+		if (is_string($value) && strlen($value) > 5 && antispam_api_cmd_spam_check($value)) {
+			watchdog('spam detected', 'Spam detected in webform value \'%value\'', array('%value' => $value), WATCHDOG_NOTICE);
+			form_error($form_state['clicked_button'], t("Invalid input"));
+			return;
+		}
+	}
+}
+
+
 /*******************************************************************************
  * Node operations
  ******************************************************************************/
@@ -1518,6 +1532,11 @@ function _antispam_get_email_for_options() {
  * Implements hook_form_alter().
  */
 function antispam_form_alter(&$form, &$form_state, $form_id) {
+  // Add anti-spam integration to webforms.
+ 	if (strpos($form_id, 'webform_client_form_') !== FALSE) {
+ 		$form['#validate'][] = 'antispam_webform_check';
+ 	}
+
   if (!($form_id == 'user_register_form' || $form_id == 'user_profile_form')) {
     return;
   }