diff --git a/poincare/src/unit_convert.cpp b/poincare/src/unit_convert.cpp
index 995798561..e38bef1fe 100644
--- a/poincare/src/unit_convert.cpp
+++ b/poincare/src/unit_convert.cpp
@@ -94,7 +94,7 @@ Expression UnitConvert::shallowBeautify(ExpressionNode::ReductionContext reducti
   }
   Expression result = Multiplication::Builder(division, unit);
   replaceWithInPlace(result);
-  result.shallowReduce(reductionContextWithoutUnits);
+  result = result.shallowReduce(reductionContextWithoutUnits);
   return result.shallowBeautify(reductionContextWithoutUnits);
 }