diff --git a/src/redis-cli.c b/src/redis-cli.c
index 45f26f04b78c51cc2f93b0d85629a1d76c337a49..ff1cd5a94d2b3dbc4be06eaf8805039ad8bc6553 100644
--- a/src/redis-cli.c
+++ b/src/redis-cli.c
@@ -1088,6 +1088,7 @@ static int parseOptions(int argc, char **argv) {
         } else if (!strcmp(argv[i],"-n") && !lastarg) {
             config.dbnum = atoi(argv[++i]);
         } else if (!strcmp(argv[i],"-a") && !lastarg) {
+            fputs("Warning: Using a password on the command line interface can be insecure.\n", stderr);
             config.auth = argv[++i];
         } else if (!strcmp(argv[i],"-u") && !lastarg) {
             parseRedisUri(argv[++i]);