diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
index 965244c..b0439a1 100644
--- a/programs/x509/cert_write.c
+++ b/programs/x509/cert_write.c
@@ -115,7 +115,7 @@
     "                          key_encipherment\n"      \
     "                          data_encipherment\n"     \
     "                          key_agreement\n"         \
-    "                          key_certificate_sign\n"  \
+    "                          key_cert_sign\n"  \
     "                          crl_sign\n"              \
     "    ns_cert_type=%%s     default: (empty)\n"       \
     "                        Comma-separated-list of values:\n"     \