diff --git a/collects/scribblings/reference/pairs.scrbl b/collects/scribblings/reference/pairs.scrbl
index 85aba51206..ee4279c582 100644
--- a/collects/scribblings/reference/pairs.scrbl
+++ b/collects/scribblings/reference/pairs.scrbl
@@ -332,7 +332,7 @@ The sort is stable: if two elements of @scheme[lst] are ``equal''
  in either order), then the elements preserve their relative order
  from @scheme[lst] in the output list.  You should therefore use
  @scheme[sort] with strict comparison functions (e.g., @scheme[<] or
- @scheme[string<?]; not @scheme[<=] or @scheme[string<=?])}
+ @scheme[string<?]; not @scheme[<=] or @scheme[string<=?]).}
 
 @; ----------------------------------------
 @section{List Searching}