diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index 3328e74..f5223fb 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -438,7 +438,7 @@
     "                                otherwise. The expansion of the macro\n" \
     "                                is printed if it is defined\n"     \
     USAGE_SERIALIZATION                                     \
-    " acceptable ciphersuite names:\n"
+    "\n"
 
 #define ALPN_LIST_SIZE  10
 #define CURVE_LIST_SIZE 20
@@ -839,34 +839,54 @@
     opt.force_srtp_profile  = DFL_SRTP_FORCE_PROFILE;
     opt.mki                 = DFL_SRTP_MKI;
 
+    p = q = NULL;
     if (argc < 1) {
 usage:
+        if (p != NULL && q != NULL) {
+            printf("unrecognized value for '%s': '%s'\n", p, q);
+        } else if (p != NULL && q == NULL) {
+            printf("unrecognized param: '%s'\n", p);
+        }
+
+        mbedtls_printf("usage: ssl_client2 [param=value] [...]\n");
+        mbedtls_printf("       ssl_client2 help[_theme]\n");
+        mbedtls_printf("'help' lists acceptable 'param' and 'value'\n");
+        mbedtls_printf("'help_ciphersuites' lists available ciphersuites\n");
+        mbedtls_printf("\n");
+
         if (ret == 0) {
             ret = 1;
         }
-
-        mbedtls_printf(USAGE1);
-        mbedtls_printf(USAGE2);
-        mbedtls_printf(USAGE3);
-        mbedtls_printf(USAGE4);
-
-        list = mbedtls_ssl_list_ciphersuites();
-        while (*list) {
-            mbedtls_printf(" %-42s", mbedtls_ssl_get_ciphersuite_name(*list));
-            list++;
-            if (!*list) {
-                break;
-            }
-            mbedtls_printf(" %s\n", mbedtls_ssl_get_ciphersuite_name(*list));
-            list++;
-        }
-        mbedtls_printf("\n");
         goto exit;
     }
 
     for (i = 1; i < argc; i++) {
         p = argv[i];
+
+        if (strcmp(p, "help") == 0) {
+            mbedtls_printf(USAGE1);
+            mbedtls_printf(USAGE2);
+            mbedtls_printf(USAGE3);
+            mbedtls_printf(USAGE4);
+
+            ret = 0;
+            goto exit;
+        }
+        if (strcmp(p, "help_ciphersuites") == 0) {
+            mbedtls_printf(" acceptable ciphersuite names:\n");
+            for (list = mbedtls_ssl_list_ciphersuites();
+                 *list != 0;
+                 list++) {
+                mbedtls_printf(" %s\n", mbedtls_ssl_get_ciphersuite_name(*list));
+            }
+
+            ret = 0;
+            goto exit;
+        }
+
         if ((q = strchr(p, '=')) == NULL) {
+            mbedtls_printf("param requires a value: '%s'\n", p);
+            p = NULL; // avoid "unrecnognized param" message
             goto usage;
         }
         *q++ = '\0';
@@ -1226,9 +1246,13 @@
         } else if (strcmp(p, "mki") == 0) {
             opt.mki = q;
         } else {
+            /* This signals that the problem is with p not q */
+            q = NULL;
             goto usage;
         }
     }
+    /* This signals that any further errors are not with a single option */
+    p = q = NULL;
 
     if (opt.nss_keylog != 0 && opt.eap_tls != 0) {
         mbedtls_printf("Error: eap_tls and nss_keylog options cannot be used together.\n");