diff --git a/.gitignore b/.gitignore
index 514b9be..11ecdf2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,5 +9,6 @@ build/
 
 # Visual Studio Code
 /.vscode/*cache*
+/.vscode/ipch/
 /.ccls-cache/
 /compile_commands.json
diff --git a/unittest/main.cpp b/unittest/main.cpp
index 2b88a58..6978b33 100644
--- a/unittest/main.cpp
+++ b/unittest/main.cpp
@@ -4,6 +4,7 @@
 #include <poly2tri/poly2tri.h>
 #include <fstream>
 #include <iostream>
+#include <iterator>
 
 BOOST_AUTO_TEST_CASE(BasicTest)
 {