diff --git a/puzzles.but b/puzzles.but
index f67194f..61923b6 100644
--- a/puzzles.but
+++ b/puzzles.but
@@ -2666,7 +2666,7 @@ all of the following conditions:
 
 \b The remaining white squares must all form one contiguous region.
 
-Credit for this puzzle goes to \i{Nikoli} \k{nikoli-singles} who call it Hitori. 
+Credit for this puzzle goes to \i{Nikoli} \k{nikoli-hitori} who call it Hitori. 
 
 Singles was contributed to this collection by James Harvey.