diff --git a/ietf/submit/utils.py b/ietf/submit/utils.py
index 16cccc9b5..49f28c419 100644
--- a/ietf/submit/utils.py
+++ b/ietf/submit/utils.py
@@ -1598,5 +1598,7 @@ def populate_yang_model_dirs():
         except UnicodeDecodeError as e:
             log.log(f"Error processing {item.name}: {e}")
 
-    ftp_moddir = Path(settings.FTP_DIR) / "yang" / "draftmod"
+    ftp_moddir = Path(settings.FTP_DIR) / "yang" / "draftmod/"
+    if not moddir.endswith("/"):
+        moddir += "/"
     subprocess.call(("/usr/bin/rsync", "-aq", "--delete", moddir, ftp_moddir))