diff --git a/poincare/src/integer.cpp b/poincare/src/integer.cpp
index 31c567049..033b8be88 100644
--- a/poincare/src/integer.cpp
+++ b/poincare/src/integer.cpp
@@ -114,7 +114,7 @@ bool Integer::operator<(const Integer &other) const {
     native_uint_t digit = m_digits[m_numberOfDigits-i-1];
     native_uint_t otherDigit = other.m_digits[m_numberOfDigits-i-1];
     if (digit != otherDigit) {
-      return (digit < otherDigit);
+      return (digit < otherDigit) != m_negative;
     }
   }
   return false;
diff --git a/poincare/test/integer.cpp b/poincare/test/integer.cpp
index 9446b6a2a..9bb8a6e3f 100644
--- a/poincare/test/integer.cpp
+++ b/poincare/test/integer.cpp
@@ -15,6 +15,9 @@ QUIZ_CASE(poincare_integer) {
 QUIZ_CASE(poincare_integer_compare) {
   assert(Integer(123) < Integer(456));
   assert(!(Integer(123) < Integer(123)));
+  assert(!(Integer(-123) < Integer(-123)));
+  assert(Integer(-100) < Integer(2));
+  assert(Integer(-200) < Integer(-100));
   assert(Integer(123) < Integer("123456789123456789"));
   assert(Integer("123456789123456788") < Integer("123456789123456789"));
   assert(!(Integer("123456789123456789") < Integer("123456789123456788")));