diff --git a/src/NetworkInterface.cpp b/src/NetworkInterface.cpp
index 31d779420f..5c3bd7bd0a 100644
--- a/src/NetworkInterface.cpp
+++ b/src/NetworkInterface.cpp
@@ -2880,7 +2880,8 @@ void NetworkInterface::periodicStatsUpdate() {
     ts_ring->insert(pt, tv.tv_sec);
   }
 
-  if((time(NULL) - tv.tv_sec) > ntop->getPrefs()->get_housekeeping_frequency())
+  if((!read_from_pcap_dump()) &&
+      (time(NULL) - tv.tv_sec) > ntop->getPrefs()->get_housekeeping_frequency())
     slow_stats_update = true;
   else
     slow_stats_update = false;