diff --git a/sample/openssl/c_rehash.rb b/sample/openssl/c_rehash.rb
index de4b66e902..8b005bbb84 100644
--- a/sample/openssl/c_rehash.rb
+++ b/sample/openssl/c_rehash.rb
@@ -156,7 +156,7 @@ private
   end
 
   def hash_name(name)
-    sprintf("%x", name.hash)
+    sprintf("%08x", name.hash)
   end
 
   def fingerprint(der)