diff --git a/std/uni.d b/std/uni.d
index cbae2ec75..d4ef34683 100644
--- a/std/uni.d
+++ b/std/uni.d
@@ -3323,7 +3323,7 @@ version(unittest)
     import std.conv, std.range, std.algorithm;
     //ensure constructor handles bad ordering and overlap
     auto c1 = CodepointSet('а', 'я'+1, 'А','Я'+1);
-    foreach(ch; chain(iota('a', 'я'+1)), iota('А','Я'+1))
+    foreach(ch; chain(iota('а', 'я'+1), iota('А','Я'+1)))
         assert(ch in c1, to!string(ch));
 
     //contiguos