diff --git a/tools/deferrals.py b/tools/deferrals.py
index f4e997c3..ca0bc324 100755
--- a/tools/deferrals.py
+++ b/tools/deferrals.py
@@ -49,7 +49,7 @@ def defer_xep(number, last_version, initials):
     else:
         version[1] = str(int(version[1]) + 1)
         del version[2:]
-    version.append("0"")
+    version.append("0")
 
     xep_text = (
         xep_text[:revision_match.start()] +