diff --git a/src/OpenHDStatisticsWriter.hpp b/src/OpenHDStatisticsWriter.hpp
index 8750eda8..a9f833e7 100644
--- a/src/OpenHDStatisticsWriter.hpp
+++ b/src/OpenHDStatisticsWriter.hpp
@@ -64,7 +64,7 @@ class OpenHDStatisticsWriter{
         // n packets that were completely lost though FEC
         uint64_t count_p_lost=0;
         // min max and avg rssi for each wifi card since the last call.
-        // if count_all is 0 nothing has been received on this card from the last call
+        // if count_all for a card at position N is 0 nothing has been received on this card from the last call (or the card at position N is not used for this instance)
         std::array<RSSIForWifiCard,MAX_RX_INTERFACES> rssiPerCard{};
     };
     void writeStats(const Data& data){