diff --git a/src/datastorage.c b/src/datastorage.c
index 801d329..b889c23 100644
--- a/src/datastorage.c
+++ b/src/datastorage.c
@@ -66,9 +66,13 @@ int go_next_help(char sort_order[], int i, probe_entry entry,
       break;
 
     // frequency
+    // mac is 5 ghz or 2.4 ghz?
     case 'f':
       return entry.freq < next_entry.freq &&
-             mac_is_equal(entry.client_addr, next_entry.client_addr);
+        entry.freq >= 5000 &&
+        next_entry.freq <= 5000 &&
+        //entry.freq < 5 &&
+        mac_is_equal(entry.client_addr, next_entry.client_addr);
       break;
 
     // signal strength (RSSI)