diff --git a/nikola/plugins/misc/scan_posts.py b/nikola/plugins/misc/scan_posts.py
index 07d3ddc094..d30933d4bd 100644
--- a/nikola/plugins/misc/scan_posts.py
+++ b/nikola/plugins/misc/scan_posts.py
@@ -83,7 +83,7 @@ def scan(self):
                              if not any([x.startswith('.')
                                          for x in p.split(os.sep)])]
 
-                for base_path in full_list:
+                for base_path in sorted(full_list):
                     if base_path in seen:
                         continue
                     try: