diff --git a/code/ATMOSPHERICS/components/unary_devices/vent_pump.dm b/code/ATMOSPHERICS/components/unary_devices/vent_pump.dm
index 61dc5a9fdb8..360bba856bd 100644
--- a/code/ATMOSPHERICS/components/unary_devices/vent_pump.dm
+++ b/code/ATMOSPHERICS/components/unary_devices/vent_pump.dm
@@ -12,6 +12,7 @@
 	use_power = 1
 
 	can_unwrench = 1
+	var/open = 0
 
 	var/area/initial_loc
 	var/area_uid