diff --git a/code/modules/assembly/timer.dm b/code/modules/assembly/timer.dm
index 0353986b57..c480ed4a4e 100644
--- a/code/modules/assembly/timer.dm
+++ b/code/modules/assembly/timer.dm
@@ -83,7 +83,7 @@
 
 	switch(action)
 		if("timing")
-			timing = !timing
+			set_state(!timing)
 			update_icon()
 			return TRUE
 		if("set_time")