diff --git a/poincare/include/poincare/tree_pool.h b/poincare/include/poincare/tree_pool.h
index 2974c8fe9..752fbf0ad 100644
--- a/poincare/include/poincare/tree_pool.h
+++ b/poincare/include/poincare/tree_pool.h
@@ -24,7 +24,15 @@ public:
   static TreePool * sharedPool();
 
   // Node
-  TreeNode * node(int identifier) const;
+  TreeNode * node(int identifier) const {
+    if (identifier <= TreeNode::FirstStaticNodeIdentifier) {
+      int index = indexOfStaticNode(identifier);
+      assert(index >= 0 && index < MaxNumberOfStaticNodes);
+      return m_staticNodes[index];
+    }
+    assert(identifier >= 0 && identifier <= MaxNumberOfNodes);
+    return m_nodeForIdentifier[identifier];
+  }
   TreeNode * last() const { return reinterpret_cast<TreeNode *>(const_cast<char *>(m_cursor)); }
 
   template <typename T>
diff --git a/poincare/src/tree_pool.cpp b/poincare/src/tree_pool.cpp
index 916bd5abc..4c331c3a8 100644
--- a/poincare/src/tree_pool.cpp
+++ b/poincare/src/tree_pool.cpp
@@ -10,16 +10,6 @@ TreePool * TreePool::sharedPool() {
   return &pool;
 }
 
-TreeNode * TreePool::node(int identifier) const {
-  if (identifier <= FirstStaticNodeIdentifier) {
-    int index = indexOfStaticNode(identifier);
-    assert(index >= 0 && index < MaxNumberOfStaticNodes);
-    return m_staticNodes[index];
-  }
-  assert(identifier >= 0 && identifier <= MaxNumberOfNodes);
-  return m_nodeForIdentifier[identifier];
-}
-
 static void memmove32(uint32_t * dst, uint32_t * src, size_t len) {
   if (src < dst && dst < src + len) {
     /* Copy backwards to avoid overwrites */