diff --git a/lib/persistent_tab_view.widget.dart b/lib/persistent_tab_view.widget.dart
index e173c8b6..f26ac570 100644
--- a/lib/persistent_tab_view.widget.dart
+++ b/lib/persistent_tab_view.widget.dart
@@ -46,7 +46,9 @@ class PersistentTabView extends PersistentTabViewBase {
             "screens and items length should be same. If you are using the onPressed callback function of 'PersistentBottomNavBarItem', enter a dummy screen like Container() in its place in the screens"),
         assert(items!.length >= 2 && items.length <= 6,
             "NavBar should have at least 2 or maximum 6 items (Except for styles 15-18)"),
-        assert(handleAndroidBackButtonPress && onWillPop == null,
+        assert(
+            handleAndroidBackButtonPress && onWillPop == null ||
+                !handleAndroidBackButtonPress && onWillPop != null,
             "If you declare the onWillPop function, you will have to handle the back function functionality yourself as your onWillPop function will override the default function."),
         super(
           key: key,
@@ -104,7 +106,9 @@ class PersistentTabView extends PersistentTabViewBase {
     this.screenTransitionAnimation = const ScreenTransitionAnimation(),
   })  : assert(itemCount == screens.length,
             "screens and items length should be same. If you are using the onPressed callback function of 'PersistentBottomNavBarItem', enter a dummy screen like Container() in its place in the screens"),
-        assert(handleAndroidBackButtonPress && onWillPop != null,
+        assert(
+            handleAndroidBackButtonPress && onWillPop == null ||
+                !handleAndroidBackButtonPress && onWillPop != null,
             "If you declare the onWillPop function, you will have to handle the back function functionality yourself as your onWillPop function will override the defualt function."),
         super(
           key: key,