diff --git a/Control/brewpi/aplant.py b/Control/brewpi/aplant.py
index 6f6e7a7..049415e 100644
--- a/Control/brewpi/aplant.py
+++ b/Control/brewpi/aplant.py
@@ -9,6 +9,10 @@ class APlant(abc.ABC):
 	def log(self, s):
 		print("{:.2f}: {}".format(time.time(), s))
 
+	@abc.abstractmethod
+	def activate(self, enable):
+		return None
+
 	@abc.abstractmethod
 	def process(self):
 		pass
@@ -25,3 +29,4 @@ class APlant(abc.ABC):
 	def getTemperature(self):
 		return None
 
+