diff --git a/parser/tst/gen-xtrans.py b/parser/tst/gen-xtrans.py
index d916028b9..d4e015551 100755
--- a/parser/tst/gen-xtrans.py
+++ b/parser/tst/gen-xtrans.py
@@ -27,7 +27,7 @@ trans_modifiers = {
 
 targets = ("", "target", "target2")
 # null_target uses "_" instead of "" because "" gets skipped in some for loops. Replace with "" when actually using the value.
-null_target = ("_")
+null_target = ("_",)
 
 named_trans = {
     "p": targets,