diff --git a/state_machine.gd b/state_machine.gd
index 6d82de1..2ebe694 100644
--- a/state_machine.gd
+++ b/state_machine.gd
@@ -118,9 +118,6 @@ func _change_state(name):
 #   e.g. ['^state1']
 #   => will populate everything but state1
 func add_transition(source, dest, conditions, trigger_name=''):
-	if not source:
-		return
-
 	var states = []
 	if typeof(source) == TYPE_ARRAY:
 		for state in source: