diff --git a/tests/closure/tclosure4.nim b/tests/closure/tclosure4.nim
index 69c076cd5..bc134ded6 100644
--- a/tests/closure/tclosure4.nim
+++ b/tests/closure/tclosure4.nim
@@ -1,7 +1,7 @@
 
 import json, tables, sequtils
 
-proc run(json_params: Table) =
+proc run(json_params: OrderedTable) =
   let json_elems = json_params["files"].elems
   # These fail compilation.
   var files = map(json_elems, proc (x: JsonNode): string = x.str)