diff --git a/poincare/include/poincare/tree_by_reference.h b/poincare/include/poincare/tree_by_reference.h
index af6a91b11..8e1bf340f 100644
--- a/poincare/include/poincare/tree_by_reference.h
+++ b/poincare/include/poincare/tree_by_reference.h
@@ -17,7 +17,11 @@ public:
   TreeByReference(TreeByReference&& tr) : m_identifier(TreePool::NoNodeIdentifier) {
     setIdentifierAndRetain(tr.identifier());
   }
-  ~TreeByReference();
+  ~TreeByReference() {
+    assert(node()->identifier() == m_identifier);
+    TreeNode * n = node();
+    n->release(n->numberOfChildren()); //TODO No malformed nodes ?
+  }
 
   /* Operators */
   TreeByReference& operator=(const TreeByReference& tr) {
diff --git a/poincare/src/tree_by_reference.cpp b/poincare/src/tree_by_reference.cpp
index 858f34584..09761d0a4 100644
--- a/poincare/src/tree_by_reference.cpp
+++ b/poincare/src/tree_by_reference.cpp
@@ -8,11 +8,6 @@ namespace Poincare {
 
 /* Constructors */
 
-TreeByReference::~TreeByReference() {
-  assert(node()->identifier() == m_identifier);
-  node()->release(numberOfChildren()); //TODO No malformed nodes ?
-}
-
 /* Clone */
 
 TreeByReference TreeByReference::clone() const {