diff --git a/test/fuzz/fuzz-network-parser/directives.network b/test/fuzz/fuzz-network-parser/directives.network
index 209132f239..822b2c2003 100644
--- a/test/fuzz/fuzz-network-parser/directives.network
+++ b/test/fuzz/fuzz-network-parser/directives.network
@@ -176,6 +176,8 @@ Prefix=
 UseDomains=
 RouteTable=
 UseDNS=
+UseAutonomousPrefix=
+UseOnLinkPrefix=
 [DHCPServer]
 EmitNTP=
 PoolSize=