diff --git a/qemu-nbd.c b/qemu-nbd.c
index ed64b6b2da..59bd2f14f3 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -190,7 +190,7 @@ int main(int argc, char **argv)
     char *device = NULL;
     char *socket = NULL;
     char sockpath[128];
-    const char *sopt = "hVbo:p:rsnP:c:dvk:e:t";
+    const char *sopt = "hVb:o:p:rsnP:c:dvk:e:t";
     struct option lopt[] = {
         { "help", 0, 0, 'h' },
         { "version", 0, 0, 'V' },