diff --git a/test/permutation_iterator_test.cpp b/test/permutation_iterator_test.cpp
index db601e8..5f17072 100644
--- a/test/permutation_iterator_test.cpp
+++ b/test/permutation_iterator_test.cpp
@@ -43,7 +43,7 @@ void permutation_test()
   const int element_range_size = 10;
   const int index_size = 7;
 
-  static_assert(index_size < element_range_size, "The permutation of some elements is checked.");
+  static_assert(index_size <= element_range_size, "The permutation of some elements is checked.");
 
   element_range_type elements( element_range_size );
   for( element_range_type::iterator el_it = elements.begin(); el_it != elements.end(); ++el_it )