diff --git a/test/fuzz/fuzz-netdev-parser/25-6rd-tunnel.netdev b/test/fuzz/fuzz-netdev-parser/25-6rd-tunnel.netdev
new file mode 100644
index 0000000000..252abf5278
--- /dev/null
+++ b/test/fuzz/fuzz-netdev-parser/25-6rd-tunnel.netdev
@@ -0,0 +1,8 @@
+[NetDev]
+Name=6rdtun99
+Kind=sit
+
+[Tunnel]
+Local=10.65.223.238
+Remote=10.65.223.239
+IPv6RapidDeploymentPrefix=2602::/24
diff --git a/test/fuzz/fuzz-netdev-parser/directives.netdev b/test/fuzz/fuzz-netdev-parser/directives.netdev
index 4725d2dad4..88d2788191 100644
--- a/test/fuzz/fuzz-netdev-parser/directives.netdev
+++ b/test/fuzz/fuzz-netdev-parser/directives.netdev
@@ -73,6 +73,7 @@ CopyDSCP=
 EncapsulationLimit=
 TTL=
 FOUSourcePort=
+IPv6RapidDeploymentPrefix=
 [VXLAN]
 UDP6ZeroChecksumRx=
 ARPProxy=