diff --git a/src/devices/thermostat.cpp b/src/devices/thermostat.cpp
index 9cc3943a3..068aac08f 100644
--- a/src/devices/thermostat.cpp
+++ b/src/devices/thermostat.cpp
@@ -1517,7 +1517,6 @@ void Thermostat::process_RC35Timer(std::shared_ptr<const Telegram> telegram) {
 
 // type 0x9A (HC1)
 void Thermostat::process_RC30Vacation(std::shared_ptr<const Telegram> telegram) {
-    uint8_t index = 0;
     if ((telegram->offset + telegram->message_length) > 57) {
         return;
     }
diff --git a/src/devices/thermostat.h b/src/devices/thermostat.h
index c46899a5a..990dd83e3 100644
--- a/src/devices/thermostat.h
+++ b/src/devices/thermostat.h
@@ -271,7 +271,7 @@ class Thermostat : public EMSdevice {
     uint8_t humidity_;
     uint8_t battery_;
 
-    char vacation[8][21]; // RC30 only, only one hc
+    char vacation[8][22]; // RC30 only, only one hc
 
     // HybridHP
     uint8_t hybridStrategy_;  // co2 = 1, cost = 2, temperature = 3, mix = 4