diff --git a/core/src/main/java/hudson/model/AbstractProject.java b/core/src/main/java/hudson/model/AbstractProject.java
index 27fab02f8668d7ebf0b47e947b8ef1c77c75109f..90c4a975f786f3eaf8ea881a750fd7e0fd7d2574 100644
--- a/core/src/main/java/hudson/model/AbstractProject.java
+++ b/core/src/main/java/hudson/model/AbstractProject.java
@@ -763,7 +763,7 @@ public abstract class AbstractProject<P extends AbstractProject<P,R>,R extends A
     /**
      * Reflect the submission of the pseudo 'upstream build trigger'.
      */
-    protected void convertUpstreamBuildTrigger(Set<AbstractProject> upstream) throws IOException {
+    /* package */ void convertUpstreamBuildTrigger(Set<AbstractProject> upstream) throws IOException {
 
         SecurityContext saveCtx = ACL.impersonate(ACL.SYSTEM);
         try {