diff --git a/src/objective-c/RxLibrary/private/GRXNSFastEnumerator.m b/src/objective-c/RxLibrary/private/GRXNSFastEnumerator.m
index 2050fa98ec7f766eb587c61cffab1b291e99741b..0387c9954eeeb81567291b002ffd1d3ed1c13e94 100644
--- a/src/objective-c/RxLibrary/private/GRXNSFastEnumerator.m
+++ b/src/objective-c/RxLibrary/private/GRXNSFastEnumerator.m
@@ -59,7 +59,6 @@
 
 // Designated initializer.
 - (instancetype)initWithContainer:(id<NSFastEnumeration>)container {
-  NSAssert(container, @"container can't be nil");
   if ((self = [super init])) {
     _container = container;
   }