diff --git a/src/wp-includes/js/wp-api.js b/src/wp-includes/js/wp-api.js
index a14d21fae6..717ebf8e06 100644
--- a/src/wp-includes/js/wp-api.js
+++ b/src/wp-includes/js/wp-api.js
@@ -1234,7 +1234,9 @@
 						},
 
 						// Specify the model that this collection contains.
-						model: loadingObjects.models[ modelClassName ],
+						model: function( attrs, options ) {
+							return new loadingObjects.models[ modelClassName ]( attrs, options );
+						},
 
 						// Include a reference to the original class name.
 						name: collectionClassName,
@@ -1257,7 +1259,9 @@
 						url: routeModel.get( 'apiRoot' ) + routeModel.get( 'versionString' ) + routeName,
 
 						// Specify the model that this collection contains.
-						model: loadingObjects.models[ modelClassName ],
+						model: function( attrs, options ) {
+							return new loadingObjects.models[ modelClassName ]( attrs, options );
+						},
 
 						// Include a reference to the original class name.
 						name: collectionClassName,