diff --git a/esp32/src/main.cpp b/esp32/src/main.cpp
index 2f2a4f3..412c35a 100644
--- a/esp32/src/main.cpp
+++ b/esp32/src/main.cpp
@@ -974,7 +974,7 @@ void plantcontrol()
 
 /** @}*/
 
-
+#ifdef TIMED_LIGHT_PIN
 bool determineTimedLightState(bool lowLight){
   bool onlyAllowedWhenDark = timedLightOnlyWhenDark.get();
   long hoursStart = timedLightStart.get();
@@ -1010,6 +1010,8 @@ bool determineTimedLightState(bool lowLight){
       }
 }
 
+#endif
+
 void log(int level, String message, int statusCode)
 {
   String buffer;