diff --git a/poincare/src/horizontal_layout_node.cpp b/poincare/src/horizontal_layout_node.cpp
index bdfa8d9b2..7ac7cf111 100644
--- a/poincare/src/horizontal_layout_node.cpp
+++ b/poincare/src/horizontal_layout_node.cpp
@@ -404,8 +404,8 @@ void HorizontalLayoutRef::mergeChildrenAtIndex(HorizontalLayoutRef h, int index,
 
   LayoutRef nextPointedLayout(nullptr);
   LayoutCursor::Position nextPosition = LayoutCursor::Position::Left;
-  if (index < numberOfChildren()) {
-    nextPointedLayout = childAtIndex(index);
+  if (newIndex < numberOfChildren()) {
+    nextPointedLayout = childAtIndex(newIndex);
     nextPosition = LayoutCursor::Position::Left;
   } else {
     nextPointedLayout = *this;