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-rw-r--r--src/nspawn/nspawn.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c
index 5af89c9b32..c22d0cb598 100644
--- a/src/nspawn/nspawn.c
+++ b/src/nspawn/nspawn.c
@@ -1657,7 +1657,7 @@ static int setup_veth(pid_t pid, char iface_name[IFNAMSIZ], int *ifi) {
/* Use two different interface name prefixes depending whether
* we are in bridge mode or not. */
- snprintf(iface_name, IFNAMSIZ, "%s-%s",
+ snprintf(iface_name, IFNAMSIZ - 1, "%s-%s",
arg_network_bridge ? "vb" : "ve", arg_machine);
r = generate_mac(&mac_container, CONTAINER_HASH_KEY);