diff --git a/functions.rkt b/functions.rkt
index 9a34767..24d5f01 100644
--- a/functions.rkt
+++ b/functions.rkt
@@ -405,7 +405,7 @@
       ;; The scalar product between the inputs and the weights.
       (for/sum ([x (in-vector inputs)]
                 [w (in-vector (tbf-w tbf))]) : Real
-        (* x w))
+               (* x w))
       (tbf-θ tbf))))
 
   (module+ test