diff --git a/src/execution/operator/aggregate/physical_streaming_window.cpp b/src/execution/operator/aggregate/physical_streaming_window.cpp
index 2eee389f178..aad0c0b3034 100644
--- a/src/execution/operator/aggregate/physical_streaming_window.cpp
+++ b/src/execution/operator/aggregate/physical_streaming_window.cpp
@@ -61,8 +61,10 @@ class StreamingWindowState : public OperatorState {
 			for (auto &child : wexpr.children) {
 				arg_types.push_back(child->return_type);
 			}
-			arg_chunk.Initialize(allocator, arg_types);
-			arg_cursor.Initialize(allocator, arg_types);
+			if (!arg_types.empty()) {
+				arg_chunk.Initialize(allocator, arg_types);
+				arg_cursor.Initialize(allocator, arg_types);
+			}
 			if (wexpr.filter_expr) {
 				filter_sel.Initialize();
 			}