diff --git a/ablescript/src/variables.rs b/ablescript/src/variables.rs
index cd0bd3a5..96c963dc 100644
--- a/ablescript/src/variables.rs
+++ b/ablescript/src/variables.rs
@@ -118,6 +118,20 @@ impl Value {
                     tape_len,
                 } => (instructions.len() + tape_len) as _,
                 Functio::Able { params, body } => (params.len() + format!("{:?}", body).len()) as _,
+                Functio::Chain { functios, kind } => {
+                    let (lhs, rhs) = *functios;
+                    match kind {
+                        FunctioChainKind::Ordered => {
+                            Value::Int(Value::Functio(lhs).into_i32())
+                                + Value::Int(Value::Functio(rhs).into_i32())
+                        }
+                        FunctioChainKind::Interlaced => {
+                            Value::Int(Value::Functio(lhs).into_i32())
+                                * Value::Int(Value::Functio(rhs).into_i32())
+                        }
+                    }
+                    .into_i32()
+                }
                 Functio::Eval(s) => s.len() as _,
             },
             Value::Int(i) => i,