diff --git a/src/fping.c b/src/fping.c
index 3ede462..a8c894f 100644
--- a/src/fping.c
+++ b/src/fping.c
@@ -1754,17 +1754,17 @@ void print_per_system_stats(void)
                 if ((resp = h->resp_times[j]) >= 0)
                     if (output_json_flag)
                         if (j == 0)
-                            print_json_keyvalue(json_int_to_string(j), sprint_tm(resp), 1, 8);
+                            print_json_nokeyvalue(sprint_tm(resp), 1, 8);
                         else
-                            print_json_keyvalue(json_int_to_string(j), sprint_tm(resp), 0, 8);
+                            print_json_nokeyvalue(sprint_tm(resp), 0, 8);
                     else
                         fprintf(stderr, " %s", sprint_tm(resp));
                 else
                     if (output_json_flag)
                         if (j == 0)
-                            print_json_keyvalue(json_int_to_string(j), "-", 1, 8);
+                            print_json_nokeyvalue("-", 1, 8);
                         else
-                            print_json_keyvalue(json_int_to_string(j), "-", 0, 8);
+                            print_json_nokeyvalue("-", 0, 8);
                     else
                         fprintf(stderr, " -");
             }