diff --git a/pagure/lib/__init__.py b/pagure/lib/__init__.py
index 8843f05..749bdee 100644
--- a/pagure/lib/__init__.py
+++ b/pagure/lib/__init__.py
@@ -1592,6 +1592,18 @@ def close_pull_request(session, request, user, requestfolder, merged=True):
         )
     )
 
+def reset_status_pull_request(session, project):
+    ''' Reset the status of all opened Pull-Requests of a project.
+    '''
+    requests = search_pull_requests(
+        session, project_id=project.id, status='Open')
+
+    for request in requests:
+        request.merge_status = None
+        session.add(request)
+
+    session.commit()
+
 
 def get_issue_statuses(session):
     ''' Return the complete list of status an issue can have.