1 files changed, 2 insertions, 4 deletions
diff --git a/src/objective-c/RxLibrary/GRXConcurrentWriteable.m b/src/objective-c/RxLibrary/GRXConcurrentWriteable.m
index d8491d2aed..115195463d 100644
--- a/src/objective-c/RxLibrary/GRXConcurrentWriteable.m
+++ b/src/objective-c/RxLibrary/GRXConcurrentWriteable.m
@@ -113,10 +113,8 @@
 
 - (void)cancelSilently {
   dispatch_async(_writeableQueue, ^{
-    @synchronized(self) {
-      if (self->_alreadyFinished) {
-        return;
-      }
+    if (self->_alreadyFinished) {
+      return;
     }
     self.writeable = nil;
   });