diff --git a/apps/ca.c b/apps/ca.c
index f79b5823697eab939fd258b82cf0429b0dfaeccf..42a3ac472b83b9e270654ae354d5041110be3db1 100644
--- a/apps/ca.c
+++ b/apps/ca.c
@@ -135,7 +135,7 @@ static char *ca_usage[]={
 " -policy arg     - The CA 'policy' to support\n",
 " -keyfile arg    - PEM private key file\n",
 " -key arg        - key to decode the private key if it is encrypted\n",
-" -cert           - The CA certificate\n",
+" -cert file      - The CA certificate\n",
 " -in file        - The input PEM encoded certificate request(s)\n",
 " -out file       - Where to put the output file(s)\n",
 " -outdir dir     - Where to put output certificates\n",