diff --git a/src/objective-c/GRPCClient/GRPCCallOptions.m b/src/objective-c/GRPCClient/GRPCCallOptions.m
index beea9ce46ec..696e81703ff 100644
--- a/src/objective-c/GRPCClient/GRPCCallOptions.m
+++ b/src/objective-c/GRPCClient/GRPCCallOptions.m
@@ -360,7 +360,7 @@ BOOL areObjectsEqual(id obj1, id obj2) {
                                                   connectMinTimeout:_connectMinTimeout
                                               connectInitialBackoff:_connectInitialBackoff
                                                   connectMaxBackoff:_connectMaxBackoff
-                                              additionalChannelArgs:[_additionalChannelArgs copy]
+                                              additionalChannelArgs:_additionalChannelArgs
                                                 PEMRootCertificates:_PEMRootCertificates
                                                       PEMPrivateKey:_PEMPrivateKey
                                                        PEMCertChain:_PEMCertChain