diff --git a/src/telegram.h b/src/telegram.h
index c168cdf87..ebcb7f1aa 100644
--- a/src/telegram.h
+++ b/src/telegram.h
@@ -189,12 +189,13 @@ class EMSbus {
 
   private:
     static constexpr uint32_t EMS_BUS_TIMEOUT = 30000; // timeout in ms before recognizing the ems bus is offline (30 seconds)
-    static uint32_t           last_bus_activity_;      // timestamp of last time a valid Rx came in
-    static bool               bus_connected_;          // start assuming the bus hasn't been connected
-    static uint8_t            ems_mask_;               // unset=0xFF, buderus=0x00, junkers/ht3=0x80
-    static uint8_t            ems_bus_id_;             // the bus id, which configurable and stored in settings
-    static uint8_t            tx_mode_;                // local copy of the tx mode
-    static uint8_t            tx_state_;               // state of the Tx line (NONE or waiting on a TX_READ or TX_WRITE)
+
+    static uint32_t last_bus_activity_; // timestamp of last time a valid Rx came in
+    static bool     bus_connected_;     // start assuming the bus hasn't been connected
+    static uint8_t  ems_mask_;          // unset=0xFF, buderus=0x00, junkers/ht3=0x80
+    static uint8_t  ems_bus_id_;        // the bus id, which configurable and stored in settings
+    static uint8_t  tx_mode_;           // local copy of the tx mode
+    static uint8_t  tx_state_;          // state of the Tx line (NONE or waiting on a TX_READ or TX_WRITE)
 };
 
 class RxService : public EMSbus {
@@ -227,7 +228,8 @@ class RxService : public EMSbus {
         if (telegram_error_count_ == 0) {
             return 100; // all good, 100%
         }
-        return (100 - (((float)telegram_error_count_ / telegram_count_ * 100)));
+        uint8_t q = ((float)telegram_error_count_ / telegram_count_ * 100);
+        return (q <= EMS_BUS_QUALITY_RX_THRESHOLD ? 100 : 100 - q);
     }
 
     class QueuedRxTelegram {
@@ -247,6 +249,8 @@ class RxService : public EMSbus {
     }
 
   private:
+    static constexpr uint8_t EMS_BUS_QUALITY_RX_THRESHOLD = 5; // % threshold before reporting quality issues
+
     uint8_t                         rx_telegram_id_       = 0; // queue counter
     uint32_t                        telegram_count_       = 0; // # Rx received
     uint32_t                        telegram_error_count_ = 0; // # Rx CRC errors