diff --git a/TODO b/TODO
index f3cbc6d..3200021 100644
--- a/TODO
+++ b/TODO
@@ -6,3 +6,4 @@ Below list contains things that should be changed/fixed/implemented.
 
 2. Some builtin functions like isset() seems to be useless, if variable is not defined, interpreter will throw an error.
 
+3. It is impossible to assign {1, 2, 3} to float[], because in fact we are trying to assign int[] to float[].