diff --git a/src/fintamath/expressions/polynomial/MulExpression.cpp b/src/fintamath/expressions/polynomial/MulExpression.cpp
index 4ffcf2337..ce3d485e6 100644
--- a/src/fintamath/expressions/polynomial/MulExpression.cpp
+++ b/src/fintamath/expressions/polynomial/MulExpression.cpp
@@ -104,7 +104,7 @@ ArgumentPtr MulExpression::simplifyNumbers(const IFunction & /*func*/, const Arg
   return {};
 }
 
-ArgumentPtr MulExpression::simplifyRationals(const IFunction & /*fiunc*/, const ArgumentPtr &lhsChild,
+ArgumentPtr MulExpression::simplifyRationals(const IFunction & /*func*/, const ArgumentPtr &lhsChild,
                                              const ArgumentPtr &rhsChild) {
 
   if (const auto lhsRat = cast<Rational>(lhsChild)) {