diff --git a/src/main/java/org/jenkinsci/plugins/github_branch_source/PullRequestGHEventSubscriber.java b/src/main/java/org/jenkinsci/plugins/github_branch_source/PullRequestGHEventSubscriber.java
index 5db9df467..ab2441988 100644
--- a/src/main/java/org/jenkinsci/plugins/github_branch_source/PullRequestGHEventSubscriber.java
+++ b/src/main/java/org/jenkinsci/plugins/github_branch_source/PullRequestGHEventSubscriber.java
@@ -101,6 +101,7 @@ protected void onEvent(GHEvent event, String payload) {
                 @Override public void run() {
                     ACL.impersonate(ACL.SYSTEM, new Runnable() {
                         @Override public void run() {
+                            boolean found = false;
                             for (final SCMSourceOwner owner : SCMSourceOwners.all()) {
                                 for (SCMSource source : owner.getSCMSources()) {
                                     if (source instanceof GitHubSCMSource) {
@@ -108,10 +109,15 @@ protected void onEvent(GHEvent event, String payload) {
                                         if (gitHubSCMSource.getRepoOwner().equals(changedRepository.getUserName()) &&
                                                 gitHubSCMSource.getRepository().equals(changedRepository.getRepositoryName())) {
                                             owner.onSCMSourceUpdated(gitHubSCMSource);
+                                            LOGGER.log(Level.FINE, "PR event on {0}:{1}/{2} forwarded to {3}", new Object[] {changedRepository.getHost(), changedRepository.getUserName(), changedRepository.getRepositoryName(), owner.getFullName()});
+                                            found = true;
                                         }
                                     }
                                 }
                             }
+                            if (!found) {
+                                LOGGER.log(Level.FINE, "PR event on {0}:{1}/{2} did not match any project", new Object[] {changedRepository.getHost(), changedRepository.getUserName(), changedRepository.getRepositoryName()});
+                            }
                         }
                     });
                 }