diff --git a/google-cloud-clients/google-cloud-core-http/src/main/java/com/google/cloud/http/HttpTransportOptions.java b/google-cloud-clients/google-cloud-core-http/src/main/java/com/google/cloud/http/HttpTransportOptions.java
index 6802e50549af..2dbcb018f857 100644
--- a/google-cloud-clients/google-cloud-core-http/src/main/java/com/google/cloud/http/HttpTransportOptions.java
+++ b/google-cloud-clients/google-cloud-core-http/src/main/java/com/google/cloud/http/HttpTransportOptions.java
@@ -120,7 +120,7 @@ public Builder setReadTimeout(int readTimeout) {
     }
   }
 
-  private HttpTransportOptions(Builder builder) {
+  public HttpTransportOptions(Builder builder) {
     httpTransportFactory =
         firstNonNull(
             builder.httpTransportFactory,