diff --git a/libstdc++-v3/testsuite/25_algorithms/is_permutation/2.cc b/libstdc++-v3/testsuite/25_algorithms/is_permutation/2.cc
index 8d15c22f593..252226ca08f 100644
--- a/libstdc++-v3/testsuite/25_algorithms/is_permutation/2.cc
+++ b/libstdc++-v3/testsuite/25_algorithms/is_permutation/2.cc
@@ -20,6 +20,7 @@
 // 25.2.12 [alg.is_permutation] Is permutation
 
 #include <algorithm>
+#include <iterator>
 #include <functional>
 #include <testsuite_hooks.h>