diff --git a/src/Characteristics.h b/src/Characteristics.h
index 7caa9d9..e77e507 100644
--- a/src/Characteristics.h
+++ b/src/Characteristics.h
@@ -113,7 +113,7 @@ struct HapCharacteristics {
   HAPCHAR( CurrentVisibilityState, 135, PR+EV, UINT8, true );
   HAPCHAR( FilterLifeLevel, AB, PR+EV, FLOAT, false );
   HAPCHAR( FilterChangeIndication, AC, PR+EV, UINT8, true );
-  HAPCHAR( FirmwareRevision, 52, PR, STRING, true );
+  HAPCHAR( FirmwareRevision, 52, PR+EV, STRING, true );
   HAPCHAR( HardwareRevision, 53, PR, STRING, true );
   HAPCHAR( HeatingThresholdTemperature, 12, PR+PW+EV, FLOAT, false );
   HAPCHAR( HoldPosition, 6F, PW, BOOL, true );
diff --git a/src/HomeSpan.h b/src/HomeSpan.h
index f0dc4ea..e05df04 100644
--- a/src/HomeSpan.h
+++ b/src/HomeSpan.h
@@ -596,7 +596,7 @@ struct SpanCharacteristic{
   void setString(const char *val){
 
     if((perms & EV) == 0){
-      Serial.printf("\n*** WARNING:  Attempt to update Characteristic::%s with setVal() ignored.  No NOTIFICATION permission on this characteristic\n\n",hapName);
+      Serial.printf("\n*** WARNING:  Attempt to update Characteristic::%s with setString() ignored.  No NOTIFICATION permission on this characteristic\n\n",hapName);
       return;
     }