diff --git a/apps/shared/poincare_helpers.h b/apps/shared/poincare_helpers.h
index 31010f61f..d2124de32 100644
--- a/apps/shared/poincare_helpers.h
+++ b/apps/shared/poincare_helpers.h
@@ -62,11 +62,11 @@ inline Poincare::Expression ParseAndSimplify(const char * text, Poincare::Contex
   return Poincare::Expression::ParseAndSimplify(text, context, complexFormat, preferences->angleUnit(), symbolicComputation);
 }
 
-inline void Simplify(Poincare::Expression * e, Poincare::Context * context, Poincare::ExpressionNode::ReductionTarget target, Poincare::ExpressionNode::SymbolicComputation symbolicComputation = Poincare::ExpressionNode::SymbolicComputation::ReplaceAllDefinedSymbolsWithDefinition) {
+inline void Simplify(Poincare::Expression * e, Poincare::Context * context, Poincare::ExpressionNode::ReductionTarget target, Poincare::ExpressionNode::SymbolicComputation symbolicComputation = Poincare::ExpressionNode::SymbolicComputation::ReplaceAllDefinedSymbolsWithDefinition, Poincare::ExpressionNode::UnitConversion unitConversion = Poincare::ExpressionNode::UnitConversion::Default) {
   Poincare::Preferences * preferences = Poincare::Preferences::sharedPreferences();
   Poincare::Preferences::ComplexFormat complexFormat = Poincare::Expression::UpdatedComplexFormatWithExpressionInput(preferences->complexFormat(), *e, context);
 
-  *e = e->simplify(Poincare::ExpressionNode::ReductionContext(context, complexFormat, preferences->angleUnit(), target, symbolicComputation));
+  *e = e->simplify(Poincare::ExpressionNode::ReductionContext(context, complexFormat, preferences->angleUnit(), target, symbolicComputation, unitConversion));
 }
 
 inline void ParseAndSimplifyAndApproximate(const char * text, Poincare::Expression * simplifiedExpression, Poincare::Expression * approximateExpression, Poincare::Context * context, Poincare::ExpressionNode::SymbolicComputation symbolicComputation = Poincare::ExpressionNode::SymbolicComputation::ReplaceAllDefinedSymbolsWithDefinition) {