diff --git a/PanModal/Delegate/PanModalPresentationDelegate.swift b/PanModal/Delegate/PanModalPresentationDelegate.swift
index 24264b74..18d7759f 100644
--- a/PanModal/Delegate/PanModalPresentationDelegate.swift
+++ b/PanModal/Delegate/PanModalPresentationDelegate.swift
@@ -52,7 +52,7 @@ extension PanModalPresentationDelegate: UIViewControllerTransitioningDelegate {
      Changes in size class during presentation are handled via the adaptive presentation delegate
      */
     public func presentationController(forPresented presented: UIViewController, presenting: UIViewController?, source: UIViewController) -> UIPresentationController? {
-        let controller = PanModalPresentationController(presentedViewController: presented, presenting: presenting)
+        let controller = PanModalPresentationController(presentedViewController: presented, presenting: presenting ?? source)
         controller.delegate = self
         return controller
     }