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diff --git a/manual/search.texi b/manual/search.texi
index e45972c743..4da504cc9e 100644
--- a/manual/search.texi
+++ b/manual/search.texi
@@ -183,6 +183,10 @@ Functions}):
 
 The @code{qsort} function derives its name from the fact that it was
 originally implemented using the ``quick sort'' algorithm.
+
+The implementation of @code{qsort} in this library might not be an
+in-place sort and might thereby use an extra amount of memory to store
+the array.
 @end deftypefun
 
 @node Search/Sort Example