diff --git a/netflowbot.py b/netflowbot.py
index b302112..7572780 100644
--- a/netflowbot.py
+++ b/netflowbot.py
@@ -545,7 +545,7 @@ def get_top_N_dstports_for_entity(interval_label, last_used_ts, max_ts, time_bet
 
             output_path_entity = NetFlowBot.construct_output_path_prefix(interval_label, direction, entity_id, interface=None)
             for l4_dst_port, traffic_bytes in c.fetchall():
-                output_path = f"{output_path_entity}.topdstports.{path_part_encode(l4_dst_port)}"
+                output_path = f"{output_path_entity}.topdstports.{path_part_encode(str(l4_dst_port))}"
                 values.append({
                     'p': output_path,
                     'v': traffic_bytes / time_between,  # Bps