diff --git a/check_sip_connected_peers b/check_sip_connected_peers
index 58c135e..2805eb7 100755
--- a/check_sip_connected_peers
+++ b/check_sip_connected_peers
@@ -102,8 +102,12 @@ do
 	fi
 done
 debug "Nb connected peers : $nb_connected"
-let avg_latency=sum_latency/nb_connected
-debug "Average latency of connected peers : $avg_latency ($sum_latency / $nb_connected)"
+avg_latency=0
+if [[ $nb_connected -gt 0 ]]
+then
+	let avg_latency=sum_latency/nb_connected
+	debug "Average latency of connected peers : $avg_latency ($sum_latency / $nb_connected)"
+fi
 
 STATE=OK
 MSG="$nb_connected peer(s) connected on $SITE_NAME with an average latency of $avg_latency ms|'connected peers':$nb_connected;$WARNING_PEER_NUMBER;$CRITICAL_PEER_NUMBER;0;0 'average latency':$avg_latency;$WARNING_LATENCY;$CRITICAL_LATENCY;0;0"