diff --git a/poincare/src/integer.cpp b/poincare/src/integer.cpp
index 90e0da445..78de87385 100644
--- a/poincare/src/integer.cpp
+++ b/poincare/src/integer.cpp
@@ -268,7 +268,7 @@ Expression * Integer::clone() {
   clone->m_negative = m_negative;
   free(clone->m_digits);
   clone->m_digits = (native_uint_t *)malloc(m_numberOfDigits*sizeof(native_uint_t));
-  for (int i=0;i<m_numberOfDigits; i++) {
+  for (unsigned int i=0;i<m_numberOfDigits; i++) {
     clone->m_digits[i] = m_digits[i];
   }
   return clone;
diff --git a/poincare/src/layout/horizontal_layout.cpp b/poincare/src/layout/horizontal_layout.cpp
index f60857318..2b43b7685 100644
--- a/poincare/src/layout/horizontal_layout.cpp
+++ b/poincare/src/layout/horizontal_layout.cpp
@@ -37,8 +37,8 @@ KDSize HorizontalLayout::computeSize() {
 }
 
 ExpressionLayout * HorizontalLayout::child(uint16_t index) {
-  assert(index <= m_number_of_children);
-  if (index < m_number_of_children) {
+  assert(index <= (unsigned int) m_number_of_children);
+  if (index < (unsigned int) m_number_of_children) {
     return m_children_layouts[index];
   } else {
     return nullptr;