diff --git a/pagure/default_config.py b/pagure/default_config.py
index 39faad0..bc6c762 100644
--- a/pagure/default_config.py
+++ b/pagure/default_config.py
@@ -184,6 +184,9 @@ BLACKLISTED_PROJECTS = [
     'static', 'pv', 'releases', 'new', 'api', 'settings',
     'logout', 'login', 'users', 'groups', 'projects', 'ssh_info']
 
+# List of prefix allowed in project names
+ALLOWED_PREFIX = []
+
 ACLS = {
     'issue_create': 'Create a new ticket against this project',
     'issue_change_status': 'Change the status of a ticket of this project',
diff --git a/pagure/lib/__init__.py b/pagure/lib/__init__.py
index 5c7e22b..45cc9ff 100644
--- a/pagure/lib/__init__.py
+++ b/pagure/lib/__init__.py
@@ -951,7 +951,7 @@ def add_pull_request_flag(session, request, username, percent, comment, url,
     return 'Flag %s' % action
 
 
-def new_project(session, user, name, blacklist,
+def new_project(session, user, name, blacklist, allowed_prefix,
                 gitfolder, docfolder, ticketfolder, requestfolder,
                 description=None, url=None, avatar_email=None,
                 parent_id=None):
@@ -963,7 +963,14 @@ def new_project(session, user, name, blacklist,
             'conflicts in URLs with pagure itself' % name
         )
 
-    second_part = name.partition('/')[2]
+    user_obj = __get_user(session, user)
+    allowed_prefix += [user] + [grp.name for grp in user_obj.groups]
+
+    first_part, _, second_part = name.partition('/')
+    if first_part not in allowed_prefix:
+        raise pagure.exceptions.PagureException(
+            'Your project name may not start with `forks/`.'
+        )
     if len(second_part) == 40:
         raise pagure.exceptions.PagureException(
             'Your project name cannot have exactly 40 characters after '
@@ -976,8 +983,6 @@ def new_project(session, user, name, blacklist,
             'The project repo "%s" already exists' % name
         )
 
-    user_obj = __get_user(session, user)
-
     project = model.Project(
         name=name,
         description=description if description else None,
diff --git a/pagure/ui/app.py b/pagure/ui/app.py
index 3612a28..c0a34ee 100644
--- a/pagure/ui/app.py
+++ b/pagure/ui/app.py
@@ -380,6 +380,7 @@ def new_project():
                 avatar_email=avatar_email,
                 user=flask.g.fas_user.username,
                 blacklist=APP.config['BLACKLISTED_PROJECTS'],
+                allowed_prefix=APP.config['ALLOWED_PREFIX'],
                 gitfolder=APP.config['GIT_FOLDER'],
                 docfolder=APP.config['DOCS_FOLDER'],
                 ticketfolder=APP.config['TICKETS_FOLDER'],