diff --git a/seahub/api2/endpoints/repos.py b/seahub/api2/endpoints/repos.py
index a80a49fe35..330c49fde7 100644
--- a/seahub/api2/endpoints/repos.py
+++ b/seahub/api2/endpoints/repos.py
@@ -120,6 +120,7 @@ class ReposView(APIView):
                     "permission": 'rw',  # Always have read-write permission to owned repo
                     "starred": r.repo_id in starred_repo_id_list,
                     "status": normalize_repo_status_code(r.status),
+                    "salt": r.salt if r.enc_version == 3 else '',
                 }
 
                 if is_pro_version() and ENABLE_STORAGE_CLASSES:
@@ -182,6 +183,7 @@ class ReposView(APIView):
                     "permission": r.permission,
                     "starred": r.repo_id in starred_repo_id_list,
                     "status": normalize_repo_status_code(r.status),
+                    "salt": r.salt if r.enc_version == 3 else '',
                 }
 
                 if r.repo_id in repos_with_admin_share_to:
@@ -225,6 +227,7 @@ class ReposView(APIView):
                     "permission": r.permission,
                     "starred": r.repo_id in starred_repo_id_list,
                     "status": normalize_repo_status_code(r.status),
+                    "salt": r.salt if r.enc_version == 3 else '',
                 }
                 repo_info_list.append(repo_info)
 
@@ -269,6 +272,7 @@ class ReposView(APIView):
                     "permission": r.permission,
                     "starred": r.repo_id in starred_repo_id_list,
                     "status": normalize_repo_status_code(r.status),
+                    "salt": r.salt if r.enc_version == 3 else '',
                 }
                 repo_info_list.append(repo_info)
 
diff --git a/seahub/api2/views.py b/seahub/api2/views.py
index 2ec69fcbea..df1d0cc80b 100644
--- a/seahub/api2/views.py
+++ b/seahub/api2/views.py
@@ -734,6 +734,7 @@ class Repos(APIView):
                     "root": '',
                     "head_commit_id": r.head_cmmt_id,
                     "version": r.version,
+                    "salt": r.salt if r.enc_version == 3 else '',
                 }
 
                 if is_pro_version() and ENABLE_STORAGE_CLASSES:
@@ -802,6 +803,7 @@ class Repos(APIView):
                     "head_commit_id": r.head_cmmt_id,
                     "version": r.version,
                     "group_name": library_group_name,
+                    "salt": r.salt if r.enc_version == 3 else '',
                 }
 
                 if r.repo_id in repos_with_admin_share_to:
@@ -859,6 +861,7 @@ class Repos(APIView):
                     "share_from": r.user,
                     "share_from_name": nickname_dict.get(r.user, ''),
                     "share_from_contact_email": contact_email_dict.get(r.user, ''),
+                    "salt": r.salt if r.enc_version == 3 else '',
                 }
                 repos_json.append(repo)
 
@@ -899,6 +902,7 @@ class Repos(APIView):
                     "root": '',
                     "head_commit_id": r.head_cmmt_id,
                     "version": r.version,
+                    "salt": r.salt if r.enc_version == 3 else '',
                 }
                 repos_json.append(repo)