diff --git a/src/cpp/client/channel.cc b/src/cpp/client/channel.cc
index 9695a0f14bc519e79a33611899124e5e82c47118..17f31c22cb6cdfb54efd4e10d5dbbaef0970041c 100644
--- a/src/cpp/client/channel.cc
+++ b/src/cpp/client/channel.cc
@@ -71,7 +71,7 @@ Call Channel::CreateCall(const RpcMethod& method, ClientContext* context,
   } else {
     const char* host_str = NULL;
     if (!context->authority().empty()) {
-      host_str = context->authority().c_str();
+      host_str = context->authority_.c_str();
     } else if (!host_.empty()) {
       host_str = host_.c_str();
     }