diff --git a/poincare/include/poincare/nth_root_layout.h b/poincare/include/poincare/nth_root_layout.h
index 5eb5b97c0..2af308d5b 100644
--- a/poincare/include/poincare/nth_root_layout.h
+++ b/poincare/include/poincare/nth_root_layout.h
@@ -19,6 +19,8 @@ public:
     m_hasIndex(hasIndex)
   {}
 
+  bool isSquareRoot() const;
+
   // Layout
   Type type() const override { return Type::NthRootLayout; }
 
diff --git a/poincare/src/nth_root_layout.cpp b/poincare/src/nth_root_layout.cpp
index ac4a9e147..b04f8168a 100644
--- a/poincare/src/nth_root_layout.cpp
+++ b/poincare/src/nth_root_layout.cpp
@@ -21,6 +21,17 @@ const uint8_t radixPixel[NthRootLayoutNode::k_leftRadixHeight][NthRootLayoutNode
 {0xFF, 0xFF, 0xFF, 0xFF, 0xCB}
 };
 
+bool NthRootLayoutNode::isSquareRoot() const {
+  if (!m_hasIndex) {
+    return true;
+  }
+  assert((const_cast<NthRootLayoutNode *>(this))->indexLayout() != nullptr);
+  if ((const_cast<NthRootLayoutNode *>(this))->indexLayout()->isEmpty()) {
+    return true;
+  }
+  return false;
+}
+
 void NthRootLayoutNode::moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
   if (cursor->layoutNode() == radicandLayout()
     && cursor->position() == LayoutCursor::Position::Left)
@@ -149,17 +160,13 @@ void NthRootLayoutNode::deleteBeforeCursor(LayoutCursor * cursor) {
 }
 
 int NthRootLayoutNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
-  if (m_hasIndex) {
-    assert((const_cast<NthRootLayoutNode *>(this))->indexLayout());
-    if ((const_cast<NthRootLayoutNode *>(this))->indexLayout()->isEmpty()) {
-      // Case: root(x,empty): Write "'SquareRootSymbol'('radicandLayout')"
-      return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, SquareRoot::s_functionHelper.name(), true, 0);
-    }
-    // Case: root(x,n)
-    return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, NthRoot::s_functionHelper.name(), true);
+  if (isSquareRoot()) {
+    /* Case: squareRoot(x) or root(x,empty):
+     * Write "SquareRootSymbol(radicandLayout) */
+    return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, SquareRoot::s_functionHelper.name(), true, 0);
   }
-  // Case: squareRoot(x)
-  return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, SquareRoot::s_functionHelper.name(), true);
+  // Case: root(x,n)
+  return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, NthRoot::s_functionHelper.name(), true);
 }
 
 KDSize NthRootLayoutNode::computeSize() {