diff --git a/toxcore/sort_test.cc b/toxcore/sort_test.cc
index a227324f57..2a08e7edac 100644
--- a/toxcore/sort_test.cc
+++ b/toxcore/sort_test.cc
@@ -6,6 +6,7 @@
 
 #include <gtest/gtest.h>
 
+#include <algorithm>  // generate, sort
 #include <limits>
 #include <random>