diff --git a/src/yunohost/service.py b/src/yunohost/service.py
index 23336f9b..7795cd45 100644
--- a/src/yunohost/service.py
+++ b/src/yunohost/service.py
@@ -285,9 +285,18 @@ def service_regen_conf(names=[], with_diff=False, force=False,
     """
     result = {}
 
-    # Just return pending conf
+    # Return the list of pending conf
     if list_pending:
-        return _get_pending_conf(names)
+        pending_conf = _get_pending_conf(names)
+        if with_diff:
+            for service, conf_files in pending_conf.items():
+                for system_path, pending_path in conf_files.items():
+                    pending_conf[service][system_path] = {
+                        'pending_conf': pending_path,
+                        'diff': _get_files_diff(
+                            system_path, pending_path, True),
+                    }
+        return pending_conf
 
     # Clean pending conf directory
     shutil.rmtree(pending_conf_dir, ignore_errors=True)