diff --git a/test/unordered/erase_equiv_tests.cpp b/test/unordered/erase_equiv_tests.cpp
index effe0cd5..50812732 100644
--- a/test/unordered/erase_equiv_tests.cpp
+++ b/test/unordered/erase_equiv_tests.cpp
@@ -16,6 +16,7 @@
 #include "../helpers/list.hpp"
 #include "../helpers/invariants.hpp"
 #include "../helpers/helpers.hpp"
+#include <algorithm>
 #include <set>
 #include <iterator>
 #include "../objects/test.hpp"