diff --git a/ios/Classes/NfcInFlutterPlugin.m b/ios/Classes/NfcInFlutterPlugin.m
index c9c0694..cf4e46e 100644
--- a/ios/Classes/NfcInFlutterPlugin.m
+++ b/ios/Classes/NfcInFlutterPlugin.m
@@ -134,7 +134,9 @@ - (FlutterError * _Nullable)onListenWithArguments:(id _Nullable)arguments eventS
 // the reader session if activate
 - (FlutterError * _Nullable)onCancelWithArguments:(id _Nullable)arguments {
     if (session != nil) {
-        [session invalidateSession];
+        if ([session isReady]) {
+            [session invalidateSession];
+        }
         session = nil;
     }
     events = nil;