diff --git a/src/fish_test_helper.cpp b/src/fish_test_helper.cpp
index 51c63a7a3..efddb7038 100644
--- a/src/fish_test_helper.cpp
+++ b/src/fish_test_helper.cpp
@@ -9,6 +9,7 @@
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
+#include <iterator> // for std::begin/end
 
 static void become_foreground_then_print_stderr() {
     if (tcsetpgrp(STDOUT_FILENO, getpgrp()) < 0) {