diff --git a/oauth2_http/java/com/google/auth/oauth2/ExternalAccountCredentials.java b/oauth2_http/java/com/google/auth/oauth2/ExternalAccountCredentials.java
index 8ac4ec401..ba4b30d4e 100644
--- a/oauth2_http/java/com/google/auth/oauth2/ExternalAccountCredentials.java
+++ b/oauth2_http/java/com/google/auth/oauth2/ExternalAccountCredentials.java
@@ -580,7 +580,7 @@ public String getWorkforcePoolUserProject() {
   }
 
   @Nullable
-  public String getUniverseDomain() {
+  String getUniverseDomain() {
     return universeDomain;
   }