diff --git a/sqlalchemy_utils/types/number_range.py b/sqlalchemy_utils/types/number_range.py
index 4d1c0b7..4a50e29 100644
--- a/sqlalchemy_utils/types/number_range.py
+++ b/sqlalchemy_utils/types/number_range.py
@@ -82,9 +82,14 @@ class IntRangeType(types.TypeDecorator, ScalarCoercible):
 
     def process_result_value(self, value, dialect):
         if value:
-            return intervals.IntInterval(value)
+            return self.canonicalize_result_value(
+                intervals.IntInterval(value)
+            )
         return value
 
+    def canonicalize_result_value(self, value):
+        return intervals.canonicalize(value, True, True)
+
     def _coerce(self, value):
         if value is not None:
             value = intervals.IntInterval(value)
diff --git a/tests/types/test_number_range.py b/tests/types/test_number_range.py
index fa8c260..38176c2 100644
--- a/tests/types/test_number_range.py
+++ b/tests/types/test_number_range.py
@@ -6,6 +6,7 @@ try:
 except ImportError:
     pass
 from tests import TestCase
+from infinity import inf
 from sqlalchemy_utils import IntRangeType
 
 
@@ -43,28 +44,28 @@ class NumberRangeTestCase(TestCase):
 
     def test_infinite_upper_bound(self):
         building = self.Building(
-            persons_at_night=intervals.IntInterval(1, float('inf'))
+            persons_at_night=intervals.IntInterval([1, inf])
         )
         self.session.add(building)
         self.session.commit()
 
         building = self.session.query(self.Building).first()
         assert building.persons_at_night.lower == 1
-        assert building.persons_at_night.upper == float('inf')
+        assert building.persons_at_night.upper == inf
 
     def test_infinite_lower_bound(self):
         building = self.Building(
-            persons_at_night=intervals.IntInterval(-float('inf'), 1)
+            persons_at_night=intervals.IntInterval([-inf, 1])
         )
         self.session.add(building)
         self.session.commit()
         building = self.session.query(self.Building).first()
-        assert building.persons_at_night.lower == -float('inf')
+        assert building.persons_at_night.lower == -inf
         assert building.persons_at_night.upper == 1
 
     def test_nullify_number_range(self):
         building = self.Building(
-            persons_at_night=intervals.IntInterval(1, 3)
+            persons_at_night=intervals.IntInterval([1, 3])
         )
 
         self.session.add(building)