diff --git a/examples/z_pub.c b/examples/z_pub.c
index 543cba694..ecc95e42d 100644
--- a/examples/z_pub.c
+++ b/examples/z_pub.c
@@ -35,11 +35,11 @@ int main(int argc, char **argv) {
 
     z_owned_config_t config = z_config_default();
     if (argc > 4) {
-        if (zc_config_insert_json(z_loan(config), Z_CONFIG_CONNECT_KEY, argv[3]) < 0) {
+        if (zc_config_insert_json(z_loan(config), Z_CONFIG_CONNECT_KEY, argv[4]) < 0) {
             printf(
                 "Couldn't insert value `%s` in configuration at `%s`. This is likely because `%s` expects a "
                 "JSON-serialized list of strings\n",
-                argv[3], Z_CONFIG_CONNECT_KEY, Z_CONFIG_CONNECT_KEY);
+                argv[4], Z_CONFIG_CONNECT_KEY, Z_CONFIG_CONNECT_KEY);
             exit(-1);
         }
     }