diff --git a/src/cpp/client/cronet_credentials.cc b/src/cpp/client/cronet_credentials.cc
index 903f72ffbf0..89ae9e7e9ce 100644
--- a/src/cpp/client/cronet_credentials.cc
+++ b/src/cpp/client/cronet_credentials.cc
@@ -55,10 +55,11 @@ class CronetChannelCredentialsImpl final : public ChannelCredentials {
   }
   void* engine_;
 };
-
-std::shared_ptr<ChannelCredentials> CronetChannelCredentials(void* engine) {
+}  // namespace grpc
+namespace grpc_impl {
+std::shared_ptr<grpc_impl::ChannelCredentials> CronetChannelCredentials(
+    void* engine) {
   return std::shared_ptr<ChannelCredentials>(
-      new CronetChannelCredentialsImpl(engine));
+      new grpc::CronetChannelCredentialsImpl(engine));
 }
-
-}  // namespace grpc
+}  // namespace grpc_impl