diff --git a/ios/RNFetchBlobNetwork.m b/ios/RNFetchBlobNetwork.m
index 16b60774e..34ebabb95 100644
--- a/ios/RNFetchBlobNetwork.m
+++ b/ios/RNFetchBlobNetwork.m
@@ -505,7 +505,7 @@ - (void) URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCom
         errMsg = [error localizedDescription];
     }
     NSDictionary * taskSession = [taskTable objectForKey:taskId];
-    BOOL isCancelled = [taskSession valueForKey:@"isCancelled"];
+    BOOL isCancelled = [[taskSession valueForKey:@"isCancelled"] boolValue];
     if(isCancelled) {
         errMsg = @"task cancelled";
     }