diff --git a/poincare/include/poincare/sum.h b/poincare/include/poincare/sum.h
index f9afbcc0e..283416e75 100644
--- a/poincare/include/poincare/sum.h
+++ b/poincare/include/poincare/sum.h
@@ -11,6 +11,7 @@ public:
   Type type() const override;
   Expression * cloneWithDifferentOperands(Expression ** newOperands,
       int numberOfOperands, bool cloneOperands = true) const override;
+  ExpressionLayout * createLayout() const override;
 };
 
 #endif
diff --git a/poincare/src/sum.cpp b/poincare/src/sum.cpp
index e5a2785d7..34d4e2c2d 100644
--- a/poincare/src/sum.cpp
+++ b/poincare/src/sum.cpp
@@ -1,9 +1,12 @@
 #include <poincare/sum.h>
 #include <poincare/symbol.h>
 #include <poincare/float.h>
-
+#include "layout/sum_layout.h"
+#include "layout/string_layout.h"
+#include "layout/horizontal_layout.h"
 extern "C" {
 #include <assert.h>
+#include <stdlib.h>
 }
 
 Sum::Sum() :
@@ -37,3 +40,10 @@ float Sum::approximate(Context& context) const {
   }
   return result;
 }
+
+ExpressionLayout * Sum::createLayout() const {
+  ExpressionLayout ** childrenLayouts = (ExpressionLayout **)malloc(2*sizeof(ExpressionLayout *));
+  childrenLayouts[0] = new StringLayout("n=", 2);
+  childrenLayouts[1] = m_args[1]->createLayout();
+  return new SumLayout(new HorizontalLayout(childrenLayouts, 2), m_args[2]->createLayout(), m_args[0]->createLayout());
+}