diff --git a/poincare/include/poincare/addition.h b/poincare/include/poincare/addition.h
index 63971f23f..d49303723 100644
--- a/poincare/include/poincare/addition.h
+++ b/poincare/include/poincare/addition.h
@@ -35,7 +35,6 @@ public:
   template<typename T> static MatrixComplex<T> computeOnComplexAndMatrix(const std::complex<T> c, const MatrixComplex<T> m, Preferences::ComplexFormat complexFormat) {
     return MatrixComplex<T>::Undefined();
   }
-  Expression getUnit() const override;
 
   // Simplification
   LayoutShape leftLayoutShape() const override {
diff --git a/poincare/src/addition.cpp b/poincare/src/addition.cpp
index aa120632a..5d99cce4b 100644
--- a/poincare/src/addition.cpp
+++ b/poincare/src/addition.cpp
@@ -29,11 +29,6 @@ int AdditionNode::getPolynomialCoefficients(Context * context, const char * symb
   return Addition(this).getPolynomialCoefficients(context, symbolName, coefficients, symbolicComputation);
 }
 
-Expression AdditionNode::getUnit() const {
-  // The expression is reduced, so we can just ask the unit of the first child
-  return childAtIndex(0)->getUnit();
-}
-
 // Layout
 
 Layout AdditionNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {