diff --git a/README.md b/README.md
index 74dcde2a..8457cf5b 100644
--- a/README.md
+++ b/README.md
@@ -336,7 +336,7 @@ See [`Containerfile`](Containerfile) for the complete dependency list used in CI
 --portable-volumes    Path-hash inodes for cross-machine snapshot/restore
 --rootfs-size <SIZE>  Minimum free space on rootfs (default: 10G)
 --no-snapshot         Disable automatic snapshot creation
---ipv6-prefix <CIDR>  Use explicit /64 prefix for routed mode (skips auto-detect and MASQUERADE)
+--ipv6-prefix <PREFIX>  Use explicit /64 prefix for routed mode (skips auto-detect and MASQUERADE)
 ```
 
 Run `fcvm --help` or `fcvm <command> --help` for full options.
diff --git a/src/commands/snapshot.rs b/src/commands/snapshot.rs
index c43d4690..d7ec0006 100644
--- a/src/commands/snapshot.rs
+++ b/src/commands/snapshot.rs
@@ -794,6 +794,7 @@ pub async fn cmd_snapshot_run(args: SnapshotRunArgs) -> Result<()> {
     vm_state.config.user = snapshot_config.metadata.user.clone();
     vm_state.config.port_mappings = port_mappings;
     vm_state.config.network_mode = network_mode;
+    vm_state.config.ipv6_prefix = snapshot_config.metadata.ipv6_prefix.clone();
     vm_state.config.tty = tty_mode;
     vm_state.config.interactive = interactive;