nit fix
diff --git a/src/objective-c/GRPCClient/GRPCCallOptions.h b/src/objective-c/GRPCClient/GRPCCallOptions.h
index 121bc04..cb0306b 100644
--- a/src/objective-c/GRPCClient/GRPCCallOptions.h
+++ b/src/objective-c/GRPCClient/GRPCCallOptions.h
@@ -243,7 +243,7 @@
/**
* Enable flow control of a gRPC call. The option is default to NO. If set to YES, writeData: method
* should only be called at most once before a didWriteData callback is issued, and
- * receiveNextMessage: must be called each time before gRPC call can issues a didReceiveMessage
+ * receiveNextMessage: must be called each time before gRPC call can issue a didReceiveMessage
* callback.
*
* If writeData: method is called more than once before issuance of a didWriteData callback, gRPC
