diff --git a/src/docs/asciidoc/index.adoc b/src/docs/asciidoc/index.adoc
index 6eac6764..4ea50f8e 100644
--- a/src/docs/asciidoc/index.adoc
+++ b/src/docs/asciidoc/index.adoc
@@ -364,7 +364,7 @@ public class PersonRepoImpl implements PersonRepo {
             public String mapFromAttributes(Attributes attrs)
                throws NamingException {
 
-               return attrs.get("cn").get();
+               return (String) attrs.get("cn").get();
             }
          });
    }
@@ -2674,4 +2674,4 @@ Another way to work against an embedded ldap server is using `org.springframewor
 </bean>
 ----
 
-Also, `org.springframework.ldap.test.unboundid.LdapTestUtils` provide methods to work with embedded ldap server programmatically.
\ No newline at end of file
+Also, `org.springframework.ldap.test.unboundid.LdapTestUtils` provide methods to work with embedded ldap server programmatically.