diff --git a/_service b/_service
index 4ea6eb6..60c239c 100644
--- a/_service
+++ b/_service
@@ -4,5 +4,9 @@
     <param name="host">ftp.gnu.org</param>
     <param name="path">/gnu/coreutils/coreutils-8.7.tar.xz</param>
   </service>
-  
+  <service name="verify_file">
+    <param name="file">_service:download_url:coreutils-8.7.tar.xz</param>
+    <param name="verifier">sha256</param>
+    <param name="checksum">6701979aeccbca0b197718c00754aaf4a801f9ee7419edf14b829d20b9f8076b</param>
+  </service>
 </services>
\ No newline at end of file