diff --git a/X10D/src/ComparableExtensions/ComparableExtensions.cs b/X10D/src/ComparableExtensions/ComparableExtensions.cs
index b1e0b49..a38de3b 100644
--- a/X10D/src/ComparableExtensions/ComparableExtensions.cs
+++ b/X10D/src/ComparableExtensions/ComparableExtensions.cs
@@ -46,6 +46,11 @@ namespace X10D
         public static bool Between<T1, T2, T3>(this T1 value, T2 lower, T3 upper)
             where T1 : IComparable<T2>, IComparable<T3>
         {
+            if (value is null)
+            {
+                throw new ArgumentNullException(nameof(value));
+            }
+            
             return value.CompareTo(lower) > 0 && value.CompareTo(upper) < 0;
         }