diff --git a/doc/misc/options b/doc/misc/options
index 2c9cddde4b..8cd0adb708 100644
--- a/doc/misc/options
+++ b/doc/misc/options
@@ -199,7 +199,6 @@ options {
         recursion <boolean>;
         recursive-clients <integer>;
         request-ixfr <boolean>;
-        request-ixfr <boolean>;
         request-nsid <boolean>;
         reserved-sockets <integer>;
         resolver-query-timeout <integer>;
@@ -412,7 +411,6 @@ view <string> <optional_class> {
         queryport-pool-updateinterval <integer>; // obsolete
         recursion <boolean>;
         request-ixfr <boolean>;
-        request-ixfr <boolean>;
         request-nsid <boolean>;
         resolver-query-timeout <integer>;
         response-policy { zone <quoted_string> [ policy ( given | disabled