diff --git a/code/_onclick/hud/action_button.dm b/code/_onclick/hud/action_button.dm
index b2665e1f98e..b3d2de3683b 100644
--- a/code/_onclick/hud/action_button.dm
+++ b/code/_onclick/hud/action_button.dm
@@ -94,7 +94,7 @@
 		old_object.MouseExited(over_location, over_control, params)
 
 	last_hovored_ref = WEAKREF(over_object)
-	over_object.MouseEntered(over_location, over_control, params)
+	over_object?.MouseEntered(over_location, over_control, params)
 
 /atom/movable/screen/movable/action_button/MouseEntered(location, control, params)
 	. = ..()