diff --git a/Scripts/Node.cs b/Scripts/Node.cs
index 27e32c7..fa196de 100644
--- a/Scripts/Node.cs
+++ b/Scripts/Node.cs
@@ -49,6 +49,8 @@ namespace XNode {
             Inherited,
             /// <summary> Allow only similar types </summary>
             Strict,
+            /// <summary> Allow similar and inherited types but checks inheritance in reverse </summary>
+            InheritedInverse,
         }
 
 #region Obsolete
diff --git a/Scripts/NodePort.cs b/Scripts/NodePort.cs
index 1000b23..5ce980c 100644
--- a/Scripts/NodePort.cs
+++ b/Scripts/NodePort.cs
@@ -259,9 +259,11 @@ namespace XNode {
             // Check input type constraints
             if (input.typeConstraint == XNode.Node.TypeConstraint.Inherited && !input.ValueType.IsAssignableFrom(output.ValueType)) return false;
             if (input.typeConstraint == XNode.Node.TypeConstraint.Strict && input.ValueType != output.ValueType) return false;
+            if (input.typeConstraint == XNode.Node.TypeConstraint.InheritedInverse && !output.ValueType.IsAssignableFrom(input.ValueType)) return false;
             // Check output type constraints
             if (output.typeConstraint == XNode.Node.TypeConstraint.Inherited && !output.ValueType.IsAssignableFrom(input.ValueType)) return false;
             if (output.typeConstraint == XNode.Node.TypeConstraint.Strict && output.ValueType != input.ValueType) return false;
+            if (output.typeConstraint == XNode.Node.TypeConstraint.InheritedInverse && !input.ValueType.IsAssignableFrom(output.ValueType)) return false;
             // Success
             return true;
         }