diff --git a/poincare/src/tree_node.cpp b/poincare/src/tree_node.cpp
index 53f858df1..1c8df84ee 100644
--- a/poincare/src/tree_node.cpp
+++ b/poincare/src/tree_node.cpp
@@ -151,7 +151,7 @@ void TreeNode::log(std::ostream & stream, bool recursive) {
   stream << "<";
   logNodeName(stream);
   stream << " id=\"" << m_identifier << "\"";
-  stream << " refCount=\"" << m_referenceCounter << "\"";
+  stream << " refCount=\"" << (int16_t)m_referenceCounter << "\"";
   stream << " size=\"" << size() << "\"";
   logAttributes(stream);
   stream << ">";