diff --git a/src/main/java/com/cloudbees/jenkins/plugins/bitbucket/impl/notifier/BitbucketBuildStatusNotifications.java b/src/main/java/com/cloudbees/jenkins/plugins/bitbucket/impl/notifier/BitbucketBuildStatusNotifications.java
index 04182408a..015e881a4 100644
--- a/src/main/java/com/cloudbees/jenkins/plugins/bitbucket/impl/notifier/BitbucketBuildStatusNotifications.java
+++ b/src/main/java/com/cloudbees/jenkins/plugins/bitbucket/impl/notifier/BitbucketBuildStatusNotifications.java
@@ -218,29 +218,36 @@ private static void sendNotifications(BitbucketSCMSource source, Run<?, ?> build
             .filters().stream()
             .anyMatch(ExcludeOriginPRBranchesSCMHeadFilter.class::isInstance);
 
-        String key;
-        String refName;
-        BitbucketApi bitbucket;
+        final String key;
+        final String refName;
+        final BitbucketApi bitbucket;
         if (rev instanceof PullRequestSCMRevision) {
             listener.getLogger().println("[Bitbucket] Notifying pull request build result");
             PullRequestSCMHead head = (PullRequestSCMHead) rev.getHead();
             key = getBuildKey(build, head.getOriginName(), shareBuildKeyBetweenBranchAndPR);
-            /*
-             * Poor documentation for bitbucket cloud at:
-             * https://community.atlassian.com/t5/Bitbucket-questions/Re-Builds-not-appearing-in-pull-requests/qaq-p/1805991/comment-id/65864#M65864
-             * that means refName null or valued with only head.getBranchName()
-             *
-             * For Bitbucket Server, refName should be "refs/heads/" + the name
-             * of the source branch of the pull request, and the build status
-             * should be posted to the repository that contains that branch.
-             * If refName is null, then Bitbucket Server does not show the
-             * build status in the list of pull requests, but still shows it
-             * on the web page of the individual pull request.
-             */
-            bitbucket = source.buildBitbucketClient(head);
-            if (BitbucketApiUtils.isCloud(bitbucket)) {
+            if (BitbucketApiUtils.isCloud(source.getServerUrl())) {
+                /*
+                 * Poor documentation for bitbucket cloud at:
+                 * https://community.atlassian.com/t5/Bitbucket-questions/Re-Builds-not-appearing-in-pull-requests/qaq-p/1805991/comment-id/65864#M65864
+                 * that means refName null or valued with only head.getBranchName()
+                 */
                 refName = null;
+                bitbucket = source.buildBitbucketClient(head);
             } else {
+                /*
+                 * Head may point to a forked repository that the credentials do
+                 * not have access to, resulting in a 401 error. So we need to
+                 * push build status to the target repository
+                 */
+                bitbucket = source.buildBitbucketClient();
+                /*
+                 * For Bitbucket Server, refName should be "refs/heads/" + the
+                 * name of the source branch of the pull request, and the build
+                 * status should be posted to the repository that contains that
+                 * branch. If refName is null, then Bitbucket Server does not
+                 * show the build status in the list of pull requests, but still
+                 * shows it on the web page of the individual pull request.
+                 */
                 refName = "refs/heads/" + head.getBranchName();
             }
         } else {