diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c
index 5de826c44a..220ae7ec9f 100644
--- a/src/nspawn/nspawn.c
+++ b/src/nspawn/nspawn.c
@@ -427,6 +427,8 @@ static int help(void) {
                "     --overlay-ro=PATH[:PATH...]:PATH\n"
                "                            Similar, but creates a read-only overlay mount\n"
                "     --bind-user=NAME       Bind user from host to container\n"
+               "     --bind-user-shell=BOOL|PATH\n"
+               "                            Configure the shell to use for --bind-user= users\n"
                "\n%3$sInput/Output:%4$s\n"
                "     --console=MODE         Select how stdin/stdout/stderr and /dev/console are\n"
                "                            set up for the container.\n"