diff --git a/polymani.pl b/polymani.pl
index 4893bc9..042cd7f 100644
--- a/polymani.pl
+++ b/polymani.pl
@@ -280,7 +280,7 @@ do_process_input(multiply(TN, PT)) :-
     polynomial_tree_to_polynomial(PT, P),
     %% Use function from UI layer
     %% Left is always the number. Enforced by parser
-    scalepoly(N, P, P2),
+    scalepoly(P, N, P2),
     simpoly(P2, SP),
     writeln(SP).
 do_process_input(op(+, TN, PT)) :-