diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index 62ca1cb..ebe71ce 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -176,7 +176,9 @@
     "                        use \"none\" to skip loading any top-level CAs.\n" \
     "    crt_file=%%s         Your own cert and chain (in bottom to top order, top may be omitted)\n" \
     "                        default: \"\" (pre-loaded)\n" \
-    "    key_file=%%s         default: \"\" (pre-loaded)\n"
+    "    key_file=%%s         default: \"\" (pre-loaded)\n"\
+    "    key_pwd=%%s          Password for key specified by key_file argument\n"\
+    "                        default: none\n"
 #else
 #define USAGE_IO \
     "    No file operations available (MBEDTLS_FS_IO not defined)\n"