diff --git a/programs/x509/cert_req.c b/programs/x509/cert_req.c
index 9b854a1..d7818d7 100644
--- a/programs/x509/cert_req.c
+++ b/programs/x509/cert_req.c
@@ -163,7 +163,7 @@
     mbedtls_ctr_drbg_init(&ctr_drbg);
     memset(buf, 0, sizeof(buf));
 
-    if (argc == 0) {
+    if (argc < 2) {
 usage:
         mbedtls_printf(USAGE);
         goto exit;