diff --git a/code/espurna/button.cpp b/code/espurna/button.cpp
index 0df4983e..4826e7a5 100644
--- a/code/espurna/button.cpp
+++ b/code/espurna/button.cpp
@@ -658,6 +658,7 @@ unsigned long repeatDelay(size_t index) {
     return internal::indexedThenGlobal(keys::RepeatDelay, index, build::repeatDelay(index));
 }
 
+[[gnu::unused]]
 size_t relay(size_t index) {
     return getSetting({keys::Relay, index}, build::relay(index));
 }
diff --git a/code/espurna/domoticz.cpp b/code/espurna/domoticz.cpp
index bce86d8d..40bcf9f9 100644
--- a/code/espurna/domoticz.cpp
+++ b/code/espurna/domoticz.cpp
@@ -317,7 +317,10 @@ void callback(unsigned int type, espurna::StringView topic, espurna::StringView
             }
 #endif
 
+#if RELAY_SUPPORT
             espurna::domoticz::relay::status(idx, nvalue > 0);
+#endif
+
             return;
         }
     }
@@ -344,6 +347,7 @@ void send(Idx idx, int nvalue, const char* svalue) {
     mqttSendRaw(settings::topicIn().c_str(), payload);
 }
 
+[[gnu::unused]]
 void send(Idx idx, int nvalue) {
     send(idx, nvalue, "");
 }
@@ -458,12 +462,14 @@ void onConnected(JsonObject& root) {
     root[FPSTR(settings::keys::LightIdx)] = settings::lightIdx().value();
 #endif
 
+#if RELAY_SUPPORT
     const size_t Relays { relayCount() };
 
     JsonArray& relays = root.createNestedArray(F("dczRelays"));
     for (size_t id = 0; id < Relays; ++id) {
         relays.add(settings::relayIdx(id).value());
     }
+#endif
 
 #if SENSOR_SUPPORT
     sensorWebSocketMagnitudes(root, PSTR("dcz"), [](JsonArray& out, size_t index) {
diff --git a/code/espurna/led.cpp b/code/espurna/led.cpp
index a3fff6ba..539217ce 100644
--- a/code/espurna/led.cpp
+++ b/code/espurna/led.cpp
@@ -543,10 +543,14 @@ LedMode mode(size_t id) {
     return getSetting({keys::Mode, id}, build::mode(id));
 }
 
+#if RELAY_SUPPORT
+
 size_t relay(size_t id) {
     return getSetting({keys::Relay, id}, build::relay(id));
 }
 
+#endif
+
 Pattern pattern(size_t id) {
     return Pattern(getSetting({keys::Pattern, id}));
 }
@@ -602,7 +606,10 @@ String NAME (size_t id) {\
 ID_VALUE(pin)
 ID_VALUE(inverse)
 ID_VALUE(mode)
+
+#if RELAY_SUPPORT
 ID_VALUE(relay)
+#endif
 
 #undef ID_VALUE
 
diff --git a/code/espurna/thingspeak.cpp b/code/espurna/thingspeak.cpp
index 0ce6a6b9..82de1ba1 100644
--- a/code/espurna/thingspeak.cpp
+++ b/code/espurna/thingspeak.cpp
@@ -704,10 +704,12 @@ void onConnected(JsonObject& root) {
     root[FPSTR(settings::keys::ClearCache)] = settings::clearCache();
     root[FPSTR(settings::keys::Address)] = settings::address();
 
+#if RELAY_SUPPORT
     JsonArray& relays = root.createNestedArray(F("tspkRelays"));
     for (size_t i = 0; i < relayCount(); ++i) {
         relays.add(settings::relay(i));
     }
+#endif
 
 #if SENSOR_SUPPORT
     sensorWebSocketMagnitudes(root, Prefix, [](JsonArray& out, size_t index) {