diff --git a/request.go b/request.go
index 9864e78..0cf4c1c 100644
--- a/request.go
+++ b/request.go
@@ -517,7 +517,7 @@ func unmarshalNode(data *Node, model reflect.Value, included *map[string]*Node)
 				if relationship.Data == nil {
 					// Explicit null supplied for the field value
 					// If a nullable relationship we set the field value to a map with a single entry
-					if isExplicitNull {
+					if isExplicitNull && strings.HasPrefix(fieldType.Type.Name(), "NullableRelationship[") {
 						fieldValue.Set(reflect.MakeMapWithSize(fieldValue.Type(), 1))
 						fieldValue.SetMapIndex(reflect.ValueOf(false), m)
 					}
@@ -531,7 +531,6 @@ func unmarshalNode(data *Node, model reflect.Value, included *map[string]*Node)
 					continue
 				}
 
-
 				err = unmarshalNodeMaybeChoice(&m, relationship.Data, annotation, choiceMapping, included)
 				if err != nil {
 					er = err