diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index 77dfb9b14..61ba5af80 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -146,7 +146,6 @@ void Expression::swapOperands(int i, int j) {
 }
 
 bool Expression::hasAncestor(const Expression * e) const {
-  assert(m_parent != this);
   if (m_parent == e) {
     return true;
   }