diff --git a/substrate/frame/support/procedural/src/benchmark.rs b/substrate/frame/support/procedural/src/benchmark.rs
index d16ad2aaa5..27c75a7f05 100644
--- a/substrate/frame/support/procedural/src/benchmark.rs
+++ b/substrate/frame/support/procedural/src/benchmark.rs
@@ -65,6 +65,7 @@ struct RangeArgs {
 	start: syn::GenericArgument,
 	_comma: Comma,
 	end: syn::GenericArgument,
+	_trailing_comma: Option<Comma>,
 	_gt_token: Gt,
 }