diff --git a/poincare/include/poincare/evaluation.h b/poincare/include/poincare/evaluation.h
index ef831a250..2da37f262 100644
--- a/poincare/include/poincare/evaluation.h
+++ b/poincare/include/poincare/evaluation.h
@@ -63,7 +63,7 @@ public:
     std::complex<T> undef = std::complex<T>(NAN, NAN);
     return MatrixComplex<T>(&undef, 1, 1);
   }
-  virtual ~MatrixComplex() {}
+  ~MatrixComplex();
   typename Poincare::Evaluation<T>::Type type() const override { return Poincare::Evaluation<T>::Type::MatrixComplex; }
   const std::complex<T> complexOperand(int i) const { return m_operands[i]; }
   int numberOfComplexOperands() const { return m_numberOfRows*m_numberOfColumns; }
diff --git a/poincare/src/evaluation.cpp b/poincare/src/evaluation.cpp
index daf6ac91d..004b5a039 100644
--- a/poincare/src/evaluation.cpp
+++ b/poincare/src/evaluation.cpp
@@ -131,6 +131,13 @@ MatrixComplex<T>::MatrixComplex(std::complex<T> * operands, int numberOfRows, in
   }
 }
 
+template<typename T>
+MatrixComplex<T>::~MatrixComplex() {
+  if (m_operands != nullptr) {
+    delete [] m_operands;
+  }
+}
+
 template<typename T>
 Expression * MatrixComplex<T>::complexToExpression(Expression::ComplexFormat complexFormat) const {
   Expression ** operands = new Expression * [numberOfComplexOperands()];